update

node_modules/luxon/README.md

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+# Luxon
+
+[![MIT License][license-image]][license] [![Build Status][travis-image]][travis-url] [![NPM version][npm-version-image]][npm-url] [![Coverage Status][test-coverage-image]][test-coverage-url] [![Doc coverage][doc-coverage-image]][doc-url] [![PRs welcome][contributing-image]][contributing-url]
+
+Luxon is a library for working with dates and times in Javascript.
+
+```js
+DateTime.local().setZone('America/New_York').minus({ weeks: 1 }).endOf('day').toISO();
+```
+
+## Features
+ * DateTime, Duration, and Interval types.
+ * Immutable, chainable, unambiguous API.
+ * Parsing and formatting for common and custom formats.
+ * Native time zone and Intl support (no locale or tz files).
+
+## Download/install
+
+[Download/install instructions](https://moment.github.io/luxon/docs/manual/install.html)
+
+## Documentation
+
+* [General documentation][doc-url]
+* [API docs](https://moment.github.io/luxon/docs/identifiers.html)
+* [Quick tour](https://moment.github.io/luxon/docs/manual/tour.html)
+* [For Moment users](https://moment.github.io/luxon/docs/manual/moment.html)
+* [Why does Luxon exist?](https://moment.github.io/luxon/docs/manual/why.html)
+* [A quick demo](https://moment.github.io/luxon/demo/global.html)
+
+## Development
+
+See [contributing](contributing.md).
+
+![Phasers to stun][phasers-image]
+
+[license-image]: http://img.shields.io/badge/license-MIT-blue.svg
+[license]: license.txt
+
+[travis-url]: http://travis-ci.org/moment/luxon
+[travis-image]: https://api.travis-ci.org/moment/luxon.svg?branch=master
+
+[npm-url]: https://npmjs.org/package/luxon
+[npm-version-image]: https://badge.fury.io/js/luxon.svg
+
+[doc-url]: https://moment.github.io/luxon/docs/
+[doc-coverage-image]: https://moment.github.io/luxon/docs/badge.svg
+
+[test-coverage-url]: https://codecov.io/gh/moment/luxon
+[test-coverage-image]: https://codecov.io/gh/moment/luxon/branch/master/graph/badge.svg
+
+[contributing-url]: https://moment.github.io/luxon/docs/manual/contributing.html
+[contributing-image]: https://img.shields.io/badge/PRs-welcome-brightgreen.svg
+
+[phasers-image]: https://img.shields.io/badge/phasers-stun-brightgreen.svg

node_modules/luxon/build/readme.md

@@ -0,0 +1 @@
+This contains Luxon's tiny website. Use `npm run site` command to copy it to the build directory.

node_modules/luxon/changelog.md

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+# Changelog
+
+## 1.21.1
+
+ * Fix for quarter parsing
+ * Some documentation updates
+
+## 1.21.0
+
+ * Added quarter support to the parser
+ * Fix some rounding issues in ISO formatting
+
+## 1.20.0
+
+ * Added Duration#mapUnits
+ * added Interval#toISODate and Interval#toISOTime
+ * Some documentation fixes
+
+## 1.19.3
+
+ * Cache offset values
+ * Fix handling of negative sub 1-hour offsets
+
+## 1.19.2
+
+ * Speculative fix for Node 6
+
+## 1.19.1
+
+ * Fix Intl.DateTimeFormat usage for polyfills
+
+## 1.19.0
+
+ * Interval#splitAt now ignores input dates outside the interval
+ * Don't allow decimals in DateTime creation
+
+## 1.18.2
+
+ * Fix handling of decimals in DateTime#plus and #minus
+
+## 1.18.1
+
+ * Fix validity when adding or subtracting time that exceeds Date max/min boundaries
+
+## 1.18.0
+
+ * Add support for macro tokens in the parser
+
+## 1.17.2
+
+ * Fix issue with `toRelative` using `style: short` with plural days
+
+## 1.17.1
+
+ * Reject out-of-range numbers in DateTime.fromMillis
+ * Reject 0s in ISO date inputs
+
+## 1.17.0
+
+ * DateTime.min and DateTime.max throw if they get the wrong kind of arguments
+ * Fixed throwOnInvalid logic for Interval
+ * Added `DATETIME_MED_WITH_WEEKDAY` preset
+
+## 1.16.1
+
+ * Catch errors trying to use Intl in weird versions of IE 11
+
+## 1.16.0
+
+ * Fixed locale default logic for `DateTime#toFormat("ZZZZ")
+
+## 1.15.0
+
+ * Added `formatOffset` to Zones
+
+## 1.14.0
+
+ * Allow the zone argument to Interval.fromISO with duration components
+ * Ignore the zone argument to Duration factory methods
+
+## 1.13.3
+
+ * Fix keepLocalTime calculations that span offset changes
+
+## 1.13.2
+
+ * Fixed ISO formatting for dates > 999
+
+## 1.13.1
+
+ * Performance improvements for regex parsing
+
+## 1.13.0
+
+ * Support numberSystem in fromFormat
+ * Fix validity for bad initial zone specifiers
+
+## 1.12.1
+
+ * Fix cross-month diffs in some scenarios
+ * Fix time zone parsing when the time zone isn't at the end
+ * Memoize IANA zone creation
+
+## 1.12.0
+
+ * Add some explicit CDN support to the NPM package
+ * Add week token to duration ISO support
+ * Lots of cleanup and test coverage changes
+
+## 1.11.4
+
+ * `setZone("local")` now returns the defaultZone if it is set
+ * Fixes for the polyfilled build
+
+## 1.11.3
+
+ * Allow 24:00 in ISO (and other) strings
+ * Fix some bugs with the typecheck functions like `DateTime.isDateTime()`
+
+## 1.11.2
+
+ * Fixed handling of some characters in fromFormat literal sections
+ * Hanlde string values in object arguments to DateTime methods
+ * Fixed toRelativeCalendar's handling of zones in the base date
+
+## 1.11.1
+
+ * Fix DateTime#plus() when spanning across AD 100
+
+## 1.11.0
+
+ * Fix low-year handling for IANA zones
+ * `DateTime#toLocal()` now uses the default locale
+ * Fix zero duration formatting
+ * Many documentation fixes
+
+## 1.10.0
+
+- Fix endOf("day") during DSTs (#399)
+- Add `Interval#mapEndpoints (#400)
+- Add `DateTime#zone` and `Info.normalizeZone` (#404)
+
+## 1.9.0
+
+- Add `DateTime#toRelative` and `DateTime#toRelativeCalendar`
+
+## 1.8.3
+
+- Allow "UTC" in the zone position of `fromSQL`
+- Force `isDateTime` and `isDuration` to return booleans in all cases
+
+## 1.8.2
+
+- Trim leading \u200e characters from offset names in Edge 16 and 17
+
+## 1.8.1
+
+- Add `DateTime.fromSeconds` and `DateTime#toSeconds`
+
+## 1.7.1
+
+- Floor the seconds instead of rounding them when outputting the 'X' format
+- Change the options to toLocale to override the configuration (the previous options were essentially ignored)
+
+## 1.6.2
+
+- Fixing merge error that resulted in bad error messages
+
+## 1.6.0
+
+- **midly breaking** Rework negative durations
+- Fix handling weekdays at the end of leap week years
+- Add isDuration, isDateTime, and isInterval
+- Fix handling of Luxon object arguments passed from other execution contexts
+
+## 1.5.0
+
+- Improved error message
+- Added DateTime#invalidExplanation, Duration#invalidExplanation, Interval#invalidExplanation to provide more details on invalid objects
+
+## 1.4.6
+
+- Cache Intl objects for an 85x speed up on basic operations using non-en locales
+
+## 1.4.5
+
+- Fix minified builds
+
+## 1.4.4
+
+- Fix hour formatting in RFC822 strings
+- Interval.fromISO accepts formats with durations
+
+## 1.4.3
+
+Removal accidentally-introduced runtime dependency
+
+## 1.4.2
+
+- Handle locale strings with BCP 47 extensions. Especially helpful for environments with funky default locales
+- Support for [weekYear]-W[weekNumber] ISO 8601 strings
+
+## 1.4.1
+
+- Empty diffs now have all the asked-for units in them, set at 0
+- Duration operations perserve the superset of units
+
+## 1.4.0
+
+- Add x and X to toFormat for formatting Epoch seconds and Epoch milliseconds
+- Parser allows a wider range of IANA zone specifiers
+- BREAKING: Etc/GMT+10 is now interpreted as UTC-10, per spec
+
+## 1.3.3
+
+Documentation fixes
+
+## 1.3.2
+
+- DateTime.fromMillis will throw if passed a non-number
+- Fixes for type checking across JS contexts
+
+## 1.3.1
+
+- Include milliseconds in Duration#toISO
+- Avoid deprecation warning from DateTime#inspect in Node 10
+
+## 1.3.0
+
+- **mildly breaking change** Duration.toFormat now floors its outputs instead of rounding them (see #224)
+- Added 'floor' option to Duration.toFormat and deprecated the 'round' option
+- Added `Dateime.toBSON`
+- Fixed infinite loop when passing invalid or zero-length durations to Interval#splitBy
+- Added better error handling to Duration.fromObject()
+
+## 1.2.1
+
+- 222x speed-up in DateTime creation for non-en locales
+- Added `DateTime#toMillis` alias for `DateTime#valueOf`
+- Fixed types on zone exports
+
+## 1.2.0
+
+- Export Zone classes
+- Fix `endOf` and `startOf` for quarters
+- Change `toFormat("Z")` to return a number for UTC
+- Allow "GTM" as an argument to `setZone`
+
+## 1.1.0
+
+- Support for zone names with more than two components
+- Fixed long-term-accurate conversions for months
+- Added `weeksInWeekYear`
+
+## 1.0.0
+
+- The big one-oh. No changes from 0.5.8.
+
+## 0.5.8
+
+- Large perf improvements for `DateTime#toFormat()`, when using non-intl numbers
+
+## 0.5.7
+
+- Added AMD build to the NPM package
+- Large performance improvements to technical formatting (e.g. `DateTime#toISO`)
+
+## 0.5.6
+
+- Refactor internals
+- Added support for fractional seconds in `Duration.fromISO`
+- Added browser global to the NPM package
+
+## 0.5.5
+
+- Best-we-can-do fix for `DateTime#toLocaleString()` for fixed-offset zones when showing the zone name in the output
+- Fixed `Duration#shiftTo` for unormalized Durations that need a rollup cascade
+
+## 0.5.4
+
+- Fix default locales in Node
+- Fix prototype to help with React inspection
+- Improve REPL output for Durations in Node
+
+## 0.5.3
+
+- Remove errant ICU runtime dep (again)
+
+## 0.5.2
+
+- Remove comments from minified builds (introduced by 0.5.1)
+
+## 0.5.1
+
+- Fixed minified builds (oops)
+- Fix computation of fractional parts of diffs
+
+## 0.5.0
+
+- `isBefore()` returns true for the end of the interval, consistent with being half-open
+- `zoneName` now rturns `null` for invalid DateTimes
+- Added quarter support
+- Adding a month to Jan 31 gives Feb 28/29
+
+## 0.4.0
+
+- Always round down to the nearest millisecond when parsing
+
+## 0.3.1
+
+- Fixed `toLocaleString` for fixed-offset zones in the absence of Intl
+- Added `Info.isValidIANAZone`
+- Made malformed zone specifiers result in invalid DateTime instances
+
+## 0.3.0
+
+- Rename DateTime.fromString to DateTime.fromFormat (leaving deprecated DateTime.fromString)
+- Rename DateTime.fromStringExplain to DateTime.fromFormatExplain (leaving deprecated DateTime.fromStringExplain)
+- Support Etc/GMT IANA zones
+- Perf fixes for zones
+- Rework build infrastructure
+
+## 0.2.12
+
+- Fix DateTime.fromObject's handling of default zones
+- Change `keepCalendarTime` to `keepLocalTime`
+
+## 0.2.11
+
+- Handle no arguments in `DateTime.min` and `DateTime.max`
+- Documentation fixes
+
+## 0.2.10
+
+- Fix bug where Durations could sometimes mutate
+
+## 0.2.9
+
+- Fix `DateTime.fromMillis(0)` more thoroughly
+
+## 0.2.8
+
+- Fix sourcemaps
+
+## 0.2.7
+
+- Fix `DateTime.fromMillis(0)`
+
+## 0.2.6
+
+- Fix 'h' and 'hh' `toFormat` tokens for midnight
+
+## 0.2.5
+
+- Better `shiftTo` behavior for durations with floating point components
+
+## 0.2.4
+
+- Fix `toHTTP` to use 24-hour hours
+- Tighten up regular expressions
+- Various documentation fixes
+
+## 0.2.3
+
+- Fixes for `diff` with multiple units
+
+## 0.2.2
+
+- Fixes for `fromSQL`, `toSQL`, `toSQLTime`, and `toSQLDate`
+- Add `includeOffset` option to `toISO` and `toISOTime`
+
+## 0.2.1
+
+- Add `module` field to package.json
+
+## 0.2.0
+
+- Remove polyfills from main builds
+- Update compilation toolchain to target builds more exactly
+- Fix IE in polyfill build
+
+## 0.1.0
+
+- Add `.fromSQL`, `#toSQL`, `#toSQLTime`, `#toSQLDate`
+- Fix AM/PM parsing
+- Major perf improvements
+- Default to system locale when using macro formats in `#toFormat`
+- `.fromISO` accepts standalone times
+- See https://github.com/moment/luxon/issues/93 for important news concerning field accessibility
+
+## 0.0.22
+
+- Add 'u' formatting and parsing
+- Add 'y', 'yyyyy', and 'yyyyyy' parsing tokens
+- Add 'yyyyyy' formatting token
+- Better error messages for missing arguments to `DateTime.fromString`
+
+## 0.0.21
+
+- Fix zones for Edge
+
+## 0.0.20
+
+- Fix `fromISO` to accept various levels of subsecond precision
+
+## 0.0.19
+
+- Fixed parsing for ordinals
+- Made parsing stricter
+
+## 0.0.18
+
+- Fixed formatting for non-hour aligned fixed-offset zones
+- Fixed longterm conversion accuracy option in diffs
+- Fixed invalid handling in `Interval#set`
+
+## 0.0.17
+
+- Fixing formatting for fixed-offset zones
+
+## 0.0.16
+
+- Fixes for IE 9 & 10
+
+## 0.0.15
+
+- Fixing busted release 0.0.14
+
+## 0.0.13
+
+- toLocaleString() and others default to the system's locale
+- support for ISO week durations in `Duration.fromISO`
+
+## 0.0.12
+
+- Improve non-Intl fallbacks for toLocaleString
+- Fix `offsetNameShort` and `offsetNameLong` for non-Intl environments
+- Added `weekdayShort`, `weekdayLong`, `monthShort`, `monthLong` DateTime getters
+
+## 0.0.10
+
+- Only include build dir in NPM module
+
+## 0.0.9
+
+- Move to Moment Github org
+
+## 0.0.8
+
+- The local zone can now report its IANA name
+- Fixed parsing bug for `yy` and `kk`
+- Improved test coverage
+
+## 0.0.7
+
+- Added `toLocaleParts`
+- Slightly more friendly month/weekday parsing
+- Default locale setting
+
+## 0.0.6
+
+- Stricter `toJSDate`
+- `fromISO` now supports `year` and `year-month` formats
+- More graceful degradation in the absence of platform features
+
+## 0.0.5
+
+Experimental, but now broadly useful.

node_modules/luxon/license.md

@@ -0,0 +1,7 @@
+Copyright 2019 JS Foundation and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/luxon/package.json

@@ -0,0 +1,133 @@
+{
+  "_args": [
+    [
+      "luxon@1.21.1",
+      "/Users/tatiana/selfdefined"
+    ]
+  ],
+  "_from": "luxon@1.21.1",
+  "_id": "luxon@1.21.1",
+  "_inBundle": false,
+  "_integrity": "sha512-3zxaKX7mj7eA80TU0sm4CfNEtiUZ2QXGjMc80rfG4d1dOnnOOWz63U9j4nYR7+1w716DYtWfdOeVhDXYlH+D4w==",
+  "_location": "/luxon",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "version",
+    "registry": true,
+    "raw": "luxon@1.21.1",
+    "name": "luxon",
+    "escapedName": "luxon",
+    "rawSpec": "1.21.1",
+    "saveSpec": null,
+    "fetchSpec": "1.21.1"
+  },
+  "_requiredBy": [
+    "/@11ty/eleventy"
+  ],
+  "_resolved": "https://registry.npmjs.org/luxon/-/luxon-1.21.1.tgz",
+  "_spec": "1.21.1",
+  "_where": "/Users/tatiana/selfdefined",
+  "author": {
+    "name": "Isaac Cambron"
+  },
+  "browser": "build/cjs-browser/luxon.js",
+  "bugs": {
+    "url": "https://github.com/moment/luxon/issues"
+  },
+  "description": "Immutable date wrapper",
+  "devDependencies": {
+    "@babel/core": "^7.1.2",
+    "@babel/node": "^7.2.2",
+    "@babel/plugin-external-helpers": "^7.1.2",
+    "@babel/preset-env": "^7.1.2",
+    "babel-core": "^7.0.0-bridge.0",
+    "babel-eslint": "latest",
+    "babel-jest": "latest",
+    "benchmark": "latest",
+    "codecov": "^3.1.0",
+    "core-js": "^2.5.7",
+    "esdoc": "^1.1.0",
+    "esdoc-standard-plugin": "latest",
+    "eslint": "6.4.0",
+    "eslint-config-defaults": "latest",
+    "eslint-config-prettier": "6.3.0",
+    "eslint-config-standard": "latest",
+    "eslint-plugin-babel": "latest",
+    "eslint-plugin-import": "latest",
+    "eslint-plugin-node": "10.0.0",
+    "eslint-plugin-prettier": "3.1.1",
+    "eslint-plugin-promise": "latest",
+    "eslint-plugin-react": "latest",
+    "eslint-plugin-standard": "latest",
+    "fs-extra": "^6.0.1",
+    "full-icu": "latest",
+    "husky": "latest",
+    "jest": "^24.7.1",
+    "lint-staged": "latest",
+    "prettier": "1.14.3",
+    "rollup": "latest",
+    "rollup-plugin-babel": "latest",
+    "rollup-plugin-babel-minify": "^6.1.1",
+    "rollup-plugin-commonjs": "^9.2.0",
+    "rollup-plugin-node-resolve": "latest",
+    "uglify-js": "latest"
+  },
+  "engines": {
+    "node": "*"
+  },
+  "files": [
+    "build/node/luxon.js",
+    "build/node/luxon.js.map",
+    "build/cjs-browser/luxon.js",
+    "build/cjs-browser/luxon.js.map",
+    "build/amd/luxon.js",
+    "build/amd/luxon.js.map",
+    "build/global/luxon.js",
+    "build/global/luxon.js.map",
+    "build/global/luxon.min.js",
+    "build/global/luxon.min.js.map",
+    "src"
+  ],
+  "homepage": "https://github.com/moment/luxon#readme",
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "jsdelivr": "build/global/luxon.min.js",
+  "keywords": [
+    "date",
+    "immutable"
+  ],
+  "license": "MIT",
+  "lint-staged": {
+    "*.{js,json}": [
+      "prettier --write",
+      "git add"
+    ]
+  },
+  "main": "build/node/luxon.js",
+  "module": "src/luxon.js",
+  "name": "luxon",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/moment/luxon.git"
+  },
+  "scripts": {
+    "benchmark": "babel-node benchmarks/datetime.js",
+    "build": "babel-node tasks/buildAll.js",
+    "build-global": "babel-node tasks/buildGlobal.js",
+    "build-node": "babel-node tasks/buildNode.js",
+    "check-doc-coverage": "babel-node tasks/docCoverage",
+    "codecov": "codecov",
+    "docs": "esdoc -c docs/index.js",
+    "format": "prettier --write 'src/**/*.js' 'test/**/*.js' 'benchmarks/*.js'",
+    "jest": "jest",
+    "lint": "eslint --quiet src test benchmarks",
+    "lint!": "npm run format && npm run lint",
+    "site": "cp -r site/** build/",
+    "test": "jest --coverage"
+  },
+  "unpkg": "build/global/luxon.min.js",
+  "version": "1.21.1"
+}

node_modules/luxon/src/duration.js

@@ -0,0 +1,788 @@
+import { InvalidArgumentError, InvalidDurationError, InvalidUnitError } from "./errors.js";
+import Formatter from "./impl/formatter.js";
+import Invalid from "./impl/invalid.js";
+import Locale from "./impl/locale.js";
+import { parseISODuration } from "./impl/regexParser.js";
+import {
+  asNumber,
+  hasOwnProperty,
+  isNumber,
+  isUndefined,
+  normalizeObject,
+  roundTo
+} from "./impl/util.js";
+import Settings from "./settings.js";
+
+const INVALID = "Invalid Duration";
+
+// unit conversion constants
+const lowOrderMatrix = {
+    weeks: {
+      days: 7,
+      hours: 7 * 24,
+      minutes: 7 * 24 * 60,
+      seconds: 7 * 24 * 60 * 60,
+      milliseconds: 7 * 24 * 60 * 60 * 1000
+    },
+    days: {
+      hours: 24,
+      minutes: 24 * 60,
+      seconds: 24 * 60 * 60,
+      milliseconds: 24 * 60 * 60 * 1000
+    },
+    hours: { minutes: 60, seconds: 60 * 60, milliseconds: 60 * 60 * 1000 },
+    minutes: { seconds: 60, milliseconds: 60 * 1000 },
+    seconds: { milliseconds: 1000 }
+  },
+  casualMatrix = Object.assign(
+    {
+      years: {
+        months: 12,
+        weeks: 52,
+        days: 365,
+        hours: 365 * 24,
+        minutes: 365 * 24 * 60,
+        seconds: 365 * 24 * 60 * 60,
+        milliseconds: 365 * 24 * 60 * 60 * 1000
+      },
+      quarters: {
+        months: 3,
+        weeks: 13,
+        days: 91,
+        hours: 91 * 24,
+        minutes: 91 * 24 * 60,
+        milliseconds: 91 * 24 * 60 * 60 * 1000
+      },
+      months: {
+        weeks: 4,
+        days: 30,
+        hours: 30 * 24,
+        minutes: 30 * 24 * 60,
+        seconds: 30 * 24 * 60 * 60,
+        milliseconds: 30 * 24 * 60 * 60 * 1000
+      }
+    },
+    lowOrderMatrix
+  ),
+  daysInYearAccurate = 146097.0 / 400,
+  daysInMonthAccurate = 146097.0 / 4800,
+  accurateMatrix = Object.assign(
+    {
+      years: {
+        months: 12,
+        weeks: daysInYearAccurate / 7,
+        days: daysInYearAccurate,
+        hours: daysInYearAccurate * 24,
+        minutes: daysInYearAccurate * 24 * 60,
+        seconds: daysInYearAccurate * 24 * 60 * 60,
+        milliseconds: daysInYearAccurate * 24 * 60 * 60 * 1000
+      },
+      quarters: {
+        months: 3,
+        weeks: daysInYearAccurate / 28,
+        days: daysInYearAccurate / 4,
+        hours: (daysInYearAccurate * 24) / 4,
+        minutes: (daysInYearAccurate * 24 * 60) / 4,
+        seconds: (daysInYearAccurate * 24 * 60 * 60) / 4,
+        milliseconds: (daysInYearAccurate * 24 * 60 * 60 * 1000) / 4
+      },
+      months: {
+        weeks: daysInMonthAccurate / 7,
+        days: daysInMonthAccurate,
+        hours: daysInMonthAccurate * 24,
+        minutes: daysInMonthAccurate * 24 * 60,
+        seconds: daysInMonthAccurate * 24 * 60 * 60,
+        milliseconds: daysInMonthAccurate * 24 * 60 * 60 * 1000
+      }
+    },
+    lowOrderMatrix
+  );
+
+// units ordered by size
+const orderedUnits = [
+  "years",
+  "quarters",
+  "months",
+  "weeks",
+  "days",
+  "hours",
+  "minutes",
+  "seconds",
+  "milliseconds"
+];
+
+const reverseUnits = orderedUnits.slice(0).reverse();
+
+// clone really means "create another instance just like this one, but with these changes"
+function clone(dur, alts, clear = false) {
+  // deep merge for vals
+  const conf = {
+    values: clear ? alts.values : Object.assign({}, dur.values, alts.values || {}),
+    loc: dur.loc.clone(alts.loc),
+    conversionAccuracy: alts.conversionAccuracy || dur.conversionAccuracy
+  };
+  return new Duration(conf);
+}
+
+function antiTrunc(n) {
+  return n < 0 ? Math.floor(n) : Math.ceil(n);
+}
+
+// NB: mutates parameters
+function convert(matrix, fromMap, fromUnit, toMap, toUnit) {
+  const conv = matrix[toUnit][fromUnit],
+    raw = fromMap[fromUnit] / conv,
+    sameSign = Math.sign(raw) === Math.sign(toMap[toUnit]),
+    // ok, so this is wild, but see the matrix in the tests
+    added =
+      !sameSign && toMap[toUnit] !== 0 && Math.abs(raw) <= 1 ? antiTrunc(raw) : Math.trunc(raw);
+  toMap[toUnit] += added;
+  fromMap[fromUnit] -= added * conv;
+}
+
+// NB: mutates parameters
+function normalizeValues(matrix, vals) {
+  reverseUnits.reduce((previous, current) => {
+    if (!isUndefined(vals[current])) {
+      if (previous) {
+        convert(matrix, vals, previous, vals, current);
+      }
+      return current;
+    } else {
+      return previous;
+    }
+  }, null);
+}
+
+/**
+ * A Duration object represents a period of time, like "2 months" or "1 day, 1 hour". Conceptually, it's just a map of units to their quantities, accompanied by some additional configuration and methods for creating, parsing, interrogating, transforming, and formatting them. They can be used on their own or in conjunction with other Luxon types; for example, you can use {@link DateTime.plus} to add a Duration object to a DateTime, producing another DateTime.
+ *
+ * Here is a brief overview of commonly used methods and getters in Duration:
+ *
+ * * **Creation** To create a Duration, use {@link Duration.fromMillis}, {@link Duration.fromObject}, or {@link Duration.fromISO}.
+ * * **Unit values** See the {@link Duration.years}, {@link Duration.months}, {@link Duration.weeks}, {@link Duration.days}, {@link Duration.hours}, {@link Duration.minutes}, {@link Duration.seconds}, {@link Duration.milliseconds} accessors.
+ * * **Configuration** See  {@link Duration.locale} and {@link Duration.numberingSystem} accessors.
+ * * **Transformation** To create new Durations out of old ones use {@link Duration.plus}, {@link Duration.minus}, {@link Duration.normalize}, {@link Duration.set}, {@link Duration.reconfigure}, {@link Duration.shiftTo}, and {@link Duration.negate}.
+ * * **Output** To convert the Duration into other representations, see {@link Duration.as}, {@link Duration.toISO}, {@link Duration.toFormat}, and {@link Duration.toJSON}
+ *
+ * There's are more methods documented below. In addition, for more information on subtler topics like internationalization and validity, see the external documentation.
+ */
+export default class Duration {
+  /**
+   * @private
+   */
+  constructor(config) {
+    const accurate = config.conversionAccuracy === "longterm" || false;
+    /**
+     * @access private
+     */
+    this.values = config.values;
+    /**
+     * @access private
+     */
+    this.loc = config.loc || Locale.create();
+    /**
+     * @access private
+     */
+    this.conversionAccuracy = accurate ? "longterm" : "casual";
+    /**
+     * @access private
+     */
+    this.invalid = config.invalid || null;
+    /**
+     * @access private
+     */
+    this.matrix = accurate ? accurateMatrix : casualMatrix;
+    /**
+     * @access private
+     */
+    this.isLuxonDuration = true;
+  }
+
+  /**
+   * Create Duration from a number of milliseconds.
+   * @param {number} count of milliseconds
+   * @param {Object} opts - options for parsing
+   * @param {string} [opts.locale='en-US'] - the locale to use
+   * @param {string} opts.numberingSystem - the numbering system to use
+   * @param {string} [opts.conversionAccuracy='casual'] - the conversion system to use
+   * @return {Duration}
+   */
+  static fromMillis(count, opts) {
+    return Duration.fromObject(Object.assign({ milliseconds: count }, opts));
+  }
+
+  /**
+   * Create a Duration from a Javascript object with keys like 'years' and 'hours.
+   * If this object is empty then a zero milliseconds duration is returned.
+   * @param {Object} obj - the object to create the DateTime from
+   * @param {number} obj.years
+   * @param {number} obj.quarters
+   * @param {number} obj.months
+   * @param {number} obj.weeks
+   * @param {number} obj.days
+   * @param {number} obj.hours
+   * @param {number} obj.minutes
+   * @param {number} obj.seconds
+   * @param {number} obj.milliseconds
+   * @param {string} [obj.locale='en-US'] - the locale to use
+   * @param {string} obj.numberingSystem - the numbering system to use
+   * @param {string} [obj.conversionAccuracy='casual'] - the conversion system to use
+   * @return {Duration}
+   */
+  static fromObject(obj) {
+    if (obj == null || typeof obj !== "object") {
+      throw new InvalidArgumentError(
+        `Duration.fromObject: argument expected to be an object, got ${
+          obj === null ? "null" : typeof obj
+        }`
+      );
+    }
+    return new Duration({
+      values: normalizeObject(obj, Duration.normalizeUnit, [
+        "locale",
+        "numberingSystem",
+        "conversionAccuracy",
+        "zone" // a bit of debt; it's super inconvenient internally not to be able to blindly pass this
+      ]),
+      loc: Locale.fromObject(obj),
+      conversionAccuracy: obj.conversionAccuracy
+    });
+  }
+
+  /**
+   * Create a Duration from an ISO 8601 duration string.
+   * @param {string} text - text to parse
+   * @param {Object} opts - options for parsing
+   * @param {string} [opts.locale='en-US'] - the locale to use
+   * @param {string} opts.numberingSystem - the numbering system to use
+   * @param {string} [opts.conversionAccuracy='casual'] - the conversion system to use
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Durations
+   * @example Duration.fromISO('P3Y6M1W4DT12H30M5S').toObject() //=> { years: 3, months: 6, weeks: 1, days: 4, hours: 12, minutes: 30, seconds: 5 }
+   * @example Duration.fromISO('PT23H').toObject() //=> { hours: 23 }
+   * @example Duration.fromISO('P5Y3M').toObject() //=> { years: 5, months: 3 }
+   * @return {Duration}
+   */
+  static fromISO(text, opts) {
+    const [parsed] = parseISODuration(text);
+    if (parsed) {
+      const obj = Object.assign(parsed, opts);
+      return Duration.fromObject(obj);
+    } else {
+      return Duration.invalid("unparsable", `the input "${text}" can't be parsed as ISO 8601`);
+    }
+  }
+
+  /**
+   * Create an invalid Duration.
+   * @param {string} reason - simple string of why this datetime is invalid. Should not contain parameters or anything else data-dependent
+   * @param {string} [explanation=null] - longer explanation, may include parameters and other useful debugging information
+   * @return {Duration}
+   */
+  static invalid(reason, explanation = null) {
+    if (!reason) {
+      throw new InvalidArgumentError("need to specify a reason the Duration is invalid");
+    }
+
+    const invalid = reason instanceof Invalid ? reason : new Invalid(reason, explanation);
+
+    if (Settings.throwOnInvalid) {
+      throw new InvalidDurationError(invalid);
+    } else {
+      return new Duration({ invalid });
+    }
+  }
+
+  /**
+   * @private
+   */
+  static normalizeUnit(unit) {
+    const normalized = {
+      year: "years",
+      years: "years",
+      quarter: "quarters",
+      quarters: "quarters",
+      month: "months",
+      months: "months",
+      week: "weeks",
+      weeks: "weeks",
+      day: "days",
+      days: "days",
+      hour: "hours",
+      hours: "hours",
+      minute: "minutes",
+      minutes: "minutes",
+      second: "seconds",
+      seconds: "seconds",
+      millisecond: "milliseconds",
+      milliseconds: "milliseconds"
+    }[unit ? unit.toLowerCase() : unit];
+
+    if (!normalized) throw new InvalidUnitError(unit);
+
+    return normalized;
+  }
+
+  /**
+   * Check if an object is a Duration. Works across context boundaries
+   * @param {object} o
+   * @return {boolean}
+   */
+  static isDuration(o) {
+    return (o && o.isLuxonDuration) || false;
+  }
+
+  /**
+   * Get  the locale of a Duration, such 'en-GB'
+   * @type {string}
+   */
+  get locale() {
+    return this.isValid ? this.loc.locale : null;
+  }
+
+  /**
+   * Get the numbering system of a Duration, such 'beng'. The numbering system is used when formatting the Duration
+   *
+   * @type {string}
+   */
+  get numberingSystem() {
+    return this.isValid ? this.loc.numberingSystem : null;
+  }
+
+  /**
+   * Returns a string representation of this Duration formatted according to the specified format string. You may use these tokens:
+   * * `S` for milliseconds
+   * * `s` for seconds
+   * * `m` for minutes
+   * * `h` for hours
+   * * `d` for days
+   * * `M` for months
+   * * `y` for years
+   * Notes:
+   * * Add padding by repeating the token, e.g. "yy" pads the years to two digits, "hhhh" pads the hours out to four digits
+   * * The duration will be converted to the set of units in the format string using {@link Duration.shiftTo} and the Durations's conversion accuracy setting.
+   * @param {string} fmt - the format string
+   * @param {Object} opts - options
+   * @param {boolean} [opts.floor=true] - floor numerical values
+   * @example Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("y d s") //=> "1 6 2"
+   * @example Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("yy dd sss") //=> "01 06 002"
+   * @example Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toFormat("M S") //=> "12 518402000"
+   * @return {string}
+   */
+  toFormat(fmt, opts = {}) {
+    // reverse-compat since 1.2; we always round down now, never up, and we do it by default
+    const fmtOpts = Object.assign({}, opts, {
+      floor: opts.round !== false && opts.floor !== false
+    });
+    return this.isValid
+      ? Formatter.create(this.loc, fmtOpts).formatDurationFromString(this, fmt)
+      : INVALID;
+  }
+
+  /**
+   * Returns a Javascript object with this Duration's values.
+   * @param opts - options for generating the object
+   * @param {boolean} [opts.includeConfig=false] - include configuration attributes in the output
+   * @example Duration.fromObject({ years: 1, days: 6, seconds: 2 }).toObject() //=> { years: 1, days: 6, seconds: 2 }
+   * @return {Object}
+   */
+  toObject(opts = {}) {
+    if (!this.isValid) return {};
+
+    const base = Object.assign({}, this.values);
+
+    if (opts.includeConfig) {
+      base.conversionAccuracy = this.conversionAccuracy;
+      base.numberingSystem = this.loc.numberingSystem;
+      base.locale = this.loc.locale;
+    }
+    return base;
+  }
+
+  /**
+   * Returns an ISO 8601-compliant string representation of this Duration.
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Durations
+   * @example Duration.fromObject({ years: 3, seconds: 45 }).toISO() //=> 'P3YT45S'
+   * @example Duration.fromObject({ months: 4, seconds: 45 }).toISO() //=> 'P4MT45S'
+   * @example Duration.fromObject({ months: 5 }).toISO() //=> 'P5M'
+   * @example Duration.fromObject({ minutes: 5 }).toISO() //=> 'PT5M'
+   * @example Duration.fromObject({ milliseconds: 6 }).toISO() //=> 'PT0.006S'
+   * @return {string}
+   */
+  toISO() {
+    // we could use the formatter, but this is an easier way to get the minimum string
+    if (!this.isValid) return null;
+
+    let s = "P";
+    if (this.years !== 0) s += this.years + "Y";
+    if (this.months !== 0 || this.quarters !== 0) s += this.months + this.quarters * 3 + "M";
+    if (this.weeks !== 0) s += this.weeks + "W";
+    if (this.days !== 0) s += this.days + "D";
+    if (this.hours !== 0 || this.minutes !== 0 || this.seconds !== 0 || this.milliseconds !== 0)
+      s += "T";
+    if (this.hours !== 0) s += this.hours + "H";
+    if (this.minutes !== 0) s += this.minutes + "M";
+    if (this.seconds !== 0 || this.milliseconds !== 0)
+      // this will handle "floating point madness" by removing extra decimal places
+      // https://stackoverflow.com/questions/588004/is-floating-point-math-broken
+      s += roundTo(this.seconds + this.milliseconds / 1000, 3) + "S";
+    if (s === "P") s += "T0S";
+    return s;
+  }
+
+  /**
+   * Returns an ISO 8601 representation of this Duration appropriate for use in JSON.
+   * @return {string}
+   */
+  toJSON() {
+    return this.toISO();
+  }
+
+  /**
+   * Returns an ISO 8601 representation of this Duration appropriate for use in debugging.
+   * @return {string}
+   */
+  toString() {
+    return this.toISO();
+  }
+
+  /**
+   * Returns an milliseconds value of this Duration.
+   * @return {number}
+   */
+  valueOf() {
+    return this.as("milliseconds");
+  }
+
+  /**
+   * Make this Duration longer by the specified amount. Return a newly-constructed Duration.
+   * @param {Duration|Object|number} duration - The amount to add. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()
+   * @return {Duration}
+   */
+  plus(duration) {
+    if (!this.isValid) return this;
+
+    const dur = friendlyDuration(duration),
+      result = {};
+
+    for (const k of orderedUnits) {
+      if (hasOwnProperty(dur.values, k) || hasOwnProperty(this.values, k)) {
+        result[k] = dur.get(k) + this.get(k);
+      }
+    }
+
+    return clone(this, { values: result }, true);
+  }
+
+  /**
+   * Make this Duration shorter by the specified amount. Return a newly-constructed Duration.
+   * @param {Duration|Object|number} duration - The amount to subtract. Either a Luxon Duration, a number of milliseconds, the object argument to Duration.fromObject()
+   * @return {Duration}
+   */
+  minus(duration) {
+    if (!this.isValid) return this;
+
+    const dur = friendlyDuration(duration);
+    return this.plus(dur.negate());
+  }
+
+  /**
+   * Scale this Duration by the specified amount. Return a newly-constructed Duration.
+   * @param {function} fn - The function to apply to each unit. Arity is 1 or 2: the value of the unit and, optionally, the unit name. Must return a number.
+   * @example Duration.fromObject({ hours: 1, minutes: 30 }).mapUnit(x => x * 2) //=> { hours: 2, minutes: 60 }
+   * @example Duration.fromObject({ hours: 1, minutes: 30 }).mapUnit((x, u) => u === "hour" ? x * 2 : x) //=> { hours: 2, minutes: 30 }
+   * @return {Duration}
+   */
+  mapUnits(fn) {
+    if (!this.isValid) return this;
+    const result = {};
+    for (const k of Object.keys(this.values)) {
+      result[k] = asNumber(fn(this.values[k], k));
+    }
+    return clone(this, { values: result }, true);
+  }
+
+  /**
+   * Get the value of unit.
+   * @param {string} unit - a unit such as 'minute' or 'day'
+   * @example Duration.fromObject({years: 2, days: 3}).years //=> 2
+   * @example Duration.fromObject({years: 2, days: 3}).months //=> 0
+   * @example Duration.fromObject({years: 2, days: 3}).days //=> 3
+   * @return {number}
+   */
+  get(unit) {
+    return this[Duration.normalizeUnit(unit)];
+  }
+
+  /**
+   * "Set" the values of specified units. Return a newly-constructed Duration.
+   * @param {Object} values - a mapping of units to numbers
+   * @example dur.set({ years: 2017 })
+   * @example dur.set({ hours: 8, minutes: 30 })
+   * @return {Duration}
+   */
+  set(values) {
+    if (!this.isValid) return this;
+
+    const mixed = Object.assign(this.values, normalizeObject(values, Duration.normalizeUnit, []));
+    return clone(this, { values: mixed });
+  }
+
+  /**
+   * "Set" the locale and/or numberingSystem.  Returns a newly-constructed Duration.
+   * @example dur.reconfigure({ locale: 'en-GB' })
+   * @return {Duration}
+   */
+  reconfigure({ locale, numberingSystem, conversionAccuracy } = {}) {
+    const loc = this.loc.clone({ locale, numberingSystem }),
+      opts = { loc };
+
+    if (conversionAccuracy) {
+      opts.conversionAccuracy = conversionAccuracy;
+    }
+
+    return clone(this, opts);
+  }
+
+  /**
+   * Return the length of the duration in the specified unit.
+   * @param {string} unit - a unit such as 'minutes' or 'days'
+   * @example Duration.fromObject({years: 1}).as('days') //=> 365
+   * @example Duration.fromObject({years: 1}).as('months') //=> 12
+   * @example Duration.fromObject({hours: 60}).as('days') //=> 2.5
+   * @return {number}
+   */
+  as(unit) {
+    return this.isValid ? this.shiftTo(unit).get(unit) : NaN;
+  }
+
+  /**
+   * Reduce this Duration to its canonical representation in its current units.
+   * @example Duration.fromObject({ years: 2, days: 5000 }).normalize().toObject() //=> { years: 15, days: 255 }
+   * @example Duration.fromObject({ hours: 12, minutes: -45 }).normalize().toObject() //=> { hours: 11, minutes: 15 }
+   * @return {Duration}
+   */
+  normalize() {
+    if (!this.isValid) return this;
+    const vals = this.toObject();
+    normalizeValues(this.matrix, vals);
+    return clone(this, { values: vals }, true);
+  }
+
+  /**
+   * Convert this Duration into its representation in a different set of units.
+   * @example Duration.fromObject({ hours: 1, seconds: 30 }).shiftTo('minutes', 'milliseconds').toObject() //=> { minutes: 60, milliseconds: 30000 }
+   * @return {Duration}
+   */
+  shiftTo(...units) {
+    if (!this.isValid) return this;
+
+    if (units.length === 0) {
+      return this;
+    }
+
+    units = units.map(u => Duration.normalizeUnit(u));
+
+    const built = {},
+      accumulated = {},
+      vals = this.toObject();
+    let lastUnit;
+
+    normalizeValues(this.matrix, vals);
+
+    for (const k of orderedUnits) {
+      if (units.indexOf(k) >= 0) {
+        lastUnit = k;
+
+        let own = 0;
+
+        // anything we haven't boiled down yet should get boiled to this unit
+        for (const ak in accumulated) {
+          own += this.matrix[ak][k] * accumulated[ak];
+          accumulated[ak] = 0;
+        }
+
+        // plus anything that's already in this unit
+        if (isNumber(vals[k])) {
+          own += vals[k];
+        }
+
+        const i = Math.trunc(own);
+        built[k] = i;
+        accumulated[k] = own - i; // we'd like to absorb these fractions in another unit
+
+        // plus anything further down the chain that should be rolled up in to this
+        for (const down in vals) {
+          if (orderedUnits.indexOf(down) > orderedUnits.indexOf(k)) {
+            convert(this.matrix, vals, down, built, k);
+          }
+        }
+        // otherwise, keep it in the wings to boil it later
+      } else if (isNumber(vals[k])) {
+        accumulated[k] = vals[k];
+      }
+    }
+
+    // anything leftover becomes the decimal for the last unit
+    // lastUnit must be defined since units is not empty
+    for (const key in accumulated) {
+      if (accumulated[key] !== 0) {
+        built[lastUnit] +=
+          key === lastUnit ? accumulated[key] : accumulated[key] / this.matrix[lastUnit][key];
+      }
+    }
+
+    return clone(this, { values: built }, true).normalize();
+  }
+
+  /**
+   * Return the negative of this Duration.
+   * @example Duration.fromObject({ hours: 1, seconds: 30 }).negate().toObject() //=> { hours: -1, seconds: -30 }
+   * @return {Duration}
+   */
+  negate() {
+    if (!this.isValid) return this;
+    const negated = {};
+    for (const k of Object.keys(this.values)) {
+      negated[k] = -this.values[k];
+    }
+    return clone(this, { values: negated }, true);
+  }
+
+  /**
+   * Get the years.
+   * @type {number}
+   */
+  get years() {
+    return this.isValid ? this.values.years || 0 : NaN;
+  }
+
+  /**
+   * Get the quarters.
+   * @type {number}
+   */
+  get quarters() {
+    return this.isValid ? this.values.quarters || 0 : NaN;
+  }
+
+  /**
+   * Get the months.
+   * @type {number}
+   */
+  get months() {
+    return this.isValid ? this.values.months || 0 : NaN;
+  }
+
+  /**
+   * Get the weeks
+   * @type {number}
+   */
+  get weeks() {
+    return this.isValid ? this.values.weeks || 0 : NaN;
+  }
+
+  /**
+   * Get the days.
+   * @type {number}
+   */
+  get days() {
+    return this.isValid ? this.values.days || 0 : NaN;
+  }
+
+  /**
+   * Get the hours.
+   * @type {number}
+   */
+  get hours() {
+    return this.isValid ? this.values.hours || 0 : NaN;
+  }
+
+  /**
+   * Get the minutes.
+   * @type {number}
+   */
+  get minutes() {
+    return this.isValid ? this.values.minutes || 0 : NaN;
+  }
+
+  /**
+   * Get the seconds.
+   * @return {number}
+   */
+  get seconds() {
+    return this.isValid ? this.values.seconds || 0 : NaN;
+  }
+
+  /**
+   * Get the milliseconds.
+   * @return {number}
+   */
+  get milliseconds() {
+    return this.isValid ? this.values.milliseconds || 0 : NaN;
+  }
+
+  /**
+   * Returns whether the Duration is invalid. Invalid durations are returned by diff operations
+   * on invalid DateTimes or Intervals.
+   * @return {boolean}
+   */
+  get isValid() {
+    return this.invalid === null;
+  }
+
+  /**
+   * Returns an error code if this Duration became invalid, or null if the Duration is valid
+   * @return {string}
+   */
+  get invalidReason() {
+    return this.invalid ? this.invalid.reason : null;
+  }
+
+  /**
+   * Returns an explanation of why this Duration became invalid, or null if the Duration is valid
+   * @type {string}
+   */
+  get invalidExplanation() {
+    return this.invalid ? this.invalid.explanation : null;
+  }
+
+  /**
+   * Equality check
+   * Two Durations are equal iff they have the same units and the same values for each unit.
+   * @param {Duration} other
+   * @return {boolean}
+   */
+  equals(other) {
+    if (!this.isValid || !other.isValid) {
+      return false;
+    }
+
+    if (!this.loc.equals(other.loc)) {
+      return false;
+    }
+
+    for (const u of orderedUnits) {
+      if (this.values[u] !== other.values[u]) {
+        return false;
+      }
+    }
+    return true;
+  }
+}
+
+/**
+ * @private
+ */
+export function friendlyDuration(durationish) {
+  if (isNumber(durationish)) {
+    return Duration.fromMillis(durationish);
+  } else if (Duration.isDuration(durationish)) {
+    return durationish;
+  } else if (typeof durationish === "object") {
+    return Duration.fromObject(durationish);
+  } else {
+    throw new InvalidArgumentError(
+      `Unknown duration argument ${durationish} of type ${typeof durationish}`
+    );
+  }
+}

node_modules/luxon/src/errors.js

@@ -0,0 +1,61 @@
+// these aren't really private, but nor are they really useful to document
+
+/**
+ * @private
+ */
+class LuxonError extends Error {}
+
+/**
+ * @private
+ */
+export class InvalidDateTimeError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid DateTime: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidIntervalError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid Interval: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidDurationError extends LuxonError {
+  constructor(reason) {
+    super(`Invalid Duration: ${reason.toMessage()}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class ConflictingSpecificationError extends LuxonError {}
+
+/**
+ * @private
+ */
+export class InvalidUnitError extends LuxonError {
+  constructor(unit) {
+    super(`Invalid unit ${unit}`);
+  }
+}
+
+/**
+ * @private
+ */
+export class InvalidArgumentError extends LuxonError {}
+
+/**
+ * @private
+ */
+export class ZoneIsAbstractError extends LuxonError {
+  constructor() {
+    super("Zone is an abstract class");
+  }
+}

node_modules/luxon/src/impl/conversions.js

@@ -0,0 +1,157 @@
+import {
+  integerBetween,
+  isLeapYear,
+  timeObject,
+  daysInYear,
+  daysInMonth,
+  weeksInWeekYear,
+  isInteger
+} from "./util.js";
+import Invalid from "./invalid.js";
+
+const nonLeapLadder = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
+  leapLadder = [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335];
+
+function unitOutOfRange(unit, value) {
+  return new Invalid(
+    "unit out of range",
+    `you specified ${value} (of type ${typeof value}) as a ${unit}, which is invalid`
+  );
+}
+
+function dayOfWeek(year, month, day) {
+  const js = new Date(Date.UTC(year, month - 1, day)).getUTCDay();
+  return js === 0 ? 7 : js;
+}
+
+function computeOrdinal(year, month, day) {
+  return day + (isLeapYear(year) ? leapLadder : nonLeapLadder)[month - 1];
+}
+
+function uncomputeOrdinal(year, ordinal) {
+  const table = isLeapYear(year) ? leapLadder : nonLeapLadder,
+    month0 = table.findIndex(i => i < ordinal),
+    day = ordinal - table[month0];
+  return { month: month0 + 1, day };
+}
+
+/**
+ * @private
+ */
+
+export function gregorianToWeek(gregObj) {
+  const { year, month, day } = gregObj,
+    ordinal = computeOrdinal(year, month, day),
+    weekday = dayOfWeek(year, month, day);
+
+  let weekNumber = Math.floor((ordinal - weekday + 10) / 7),
+    weekYear;
+
+  if (weekNumber < 1) {
+    weekYear = year - 1;
+    weekNumber = weeksInWeekYear(weekYear);
+  } else if (weekNumber > weeksInWeekYear(year)) {
+    weekYear = year + 1;
+    weekNumber = 1;
+  } else {
+    weekYear = year;
+  }
+
+  return Object.assign({ weekYear, weekNumber, weekday }, timeObject(gregObj));
+}
+
+export function weekToGregorian(weekData) {
+  const { weekYear, weekNumber, weekday } = weekData,
+    weekdayOfJan4 = dayOfWeek(weekYear, 1, 4),
+    yearInDays = daysInYear(weekYear);
+
+  let ordinal = weekNumber * 7 + weekday - weekdayOfJan4 - 3,
+    year;
+
+  if (ordinal < 1) {
+    year = weekYear - 1;
+    ordinal += daysInYear(year);
+  } else if (ordinal > yearInDays) {
+    year = weekYear + 1;
+    ordinal -= daysInYear(weekYear);
+  } else {
+    year = weekYear;
+  }
+
+  const { month, day } = uncomputeOrdinal(year, ordinal);
+
+  return Object.assign({ year, month, day }, timeObject(weekData));
+}
+
+export function gregorianToOrdinal(gregData) {
+  const { year, month, day } = gregData,
+    ordinal = computeOrdinal(year, month, day);
+
+  return Object.assign({ year, ordinal }, timeObject(gregData));
+}
+
+export function ordinalToGregorian(ordinalData) {
+  const { year, ordinal } = ordinalData,
+    { month, day } = uncomputeOrdinal(year, ordinal);
+
+  return Object.assign({ year, month, day }, timeObject(ordinalData));
+}
+
+export function hasInvalidWeekData(obj) {
+  const validYear = isInteger(obj.weekYear),
+    validWeek = integerBetween(obj.weekNumber, 1, weeksInWeekYear(obj.weekYear)),
+    validWeekday = integerBetween(obj.weekday, 1, 7);
+
+  if (!validYear) {
+    return unitOutOfRange("weekYear", obj.weekYear);
+  } else if (!validWeek) {
+    return unitOutOfRange("week", obj.week);
+  } else if (!validWeekday) {
+    return unitOutOfRange("weekday", obj.weekday);
+  } else return false;
+}
+
+export function hasInvalidOrdinalData(obj) {
+  const validYear = isInteger(obj.year),
+    validOrdinal = integerBetween(obj.ordinal, 1, daysInYear(obj.year));
+
+  if (!validYear) {
+    return unitOutOfRange("year", obj.year);
+  } else if (!validOrdinal) {
+    return unitOutOfRange("ordinal", obj.ordinal);
+  } else return false;
+}
+
+export function hasInvalidGregorianData(obj) {
+  const validYear = isInteger(obj.year),
+    validMonth = integerBetween(obj.month, 1, 12),
+    validDay = integerBetween(obj.day, 1, daysInMonth(obj.year, obj.month));
+
+  if (!validYear) {
+    return unitOutOfRange("year", obj.year);
+  } else if (!validMonth) {
+    return unitOutOfRange("month", obj.month);
+  } else if (!validDay) {
+    return unitOutOfRange("day", obj.day);
+  } else return false;
+}
+
+export function hasInvalidTimeData(obj) {
+  const { hour, minute, second, millisecond } = obj;
+  const validHour =
+      integerBetween(hour, 0, 23) ||
+      (hour === 24 && minute === 0 && second === 0 && millisecond === 0),
+    validMinute = integerBetween(minute, 0, 59),
+    validSecond = integerBetween(second, 0, 59),
+    validMillisecond = integerBetween(millisecond, 0, 999);
+
+  if (!validHour) {
+    return unitOutOfRange("hour", hour);
+  } else if (!validMinute) {
+    return unitOutOfRange("minute", minute);
+  } else if (!validSecond) {
+    return unitOutOfRange("second", second);
+  } else if (!validMillisecond) {
+    return unitOutOfRange("millisecond", millisecond);
+  } else return false;
+}

node_modules/luxon/src/impl/diff.js

@@ -0,0 +1,79 @@
+import Duration from "../duration.js";
+
+function dayDiff(earlier, later) {
+  const utcDayStart = dt =>
+      dt
+        .toUTC(0, { keepLocalTime: true })
+        .startOf("day")
+        .valueOf(),
+    ms = utcDayStart(later) - utcDayStart(earlier);
+  return Math.floor(Duration.fromMillis(ms).as("days"));
+}
+
+function highOrderDiffs(cursor, later, units) {
+  const differs = [
+    ["years", (a, b) => b.year - a.year],
+    ["months", (a, b) => b.month - a.month + (b.year - a.year) * 12],
+    [
+      "weeks",
+      (a, b) => {
+        const days = dayDiff(a, b);
+        return (days - (days % 7)) / 7;
+      }
+    ],
+    ["days", dayDiff]
+  ];
+
+  const results = {};
+  let lowestOrder, highWater;
+
+  for (const [unit, differ] of differs) {
+    if (units.indexOf(unit) >= 0) {
+      lowestOrder = unit;
+
+      let delta = differ(cursor, later);
+      highWater = cursor.plus({ [unit]: delta });
+
+      if (highWater > later) {
+        cursor = cursor.plus({ [unit]: delta - 1 });
+        delta -= 1;
+      } else {
+        cursor = highWater;
+      }
+
+      results[unit] = delta;
+    }
+  }
+
+  return [cursor, results, highWater, lowestOrder];
+}
+
+export default function(earlier, later, units, opts) {
+  let [cursor, results, highWater, lowestOrder] = highOrderDiffs(earlier, later, units);
+
+  const remainingMillis = later - cursor;
+
+  const lowerOrderUnits = units.filter(
+    u => ["hours", "minutes", "seconds", "milliseconds"].indexOf(u) >= 0
+  );
+
+  if (lowerOrderUnits.length === 0) {
+    if (highWater < later) {
+      highWater = cursor.plus({ [lowestOrder]: 1 });
+    }
+
+    if (highWater !== cursor) {
+      results[lowestOrder] = (results[lowestOrder] || 0) + remainingMillis / (highWater - cursor);
+    }
+  }
+
+  const duration = Duration.fromObject(Object.assign(results, opts));
+
+  if (lowerOrderUnits.length > 0) {
+    return Duration.fromMillis(remainingMillis, opts)
+      .shiftTo(...lowerOrderUnits)
+      .plus(duration);
+  } else {
+    return duration;
+  }
+}

node_modules/luxon/src/impl/digits.js

@@ -0,0 +1,76 @@
+const numberingSystems = {
+  arab: "[\u0660-\u0669]",
+  arabext: "[\u06F0-\u06F9]",
+  bali: "[\u1B50-\u1B59]",
+  beng: "[\u09E6-\u09EF]",
+  deva: "[\u0966-\u096F]",
+  fullwide: "[\uFF10-\uFF19]",
+  gujr: "[\u0AE6-\u0AEF]",
+  hanidec: "[〇|一|二|三|四|五|六|七|八|九]",
+  khmr: "[\u17E0-\u17E9]",
+  knda: "[\u0CE6-\u0CEF]",
+  laoo: "[\u0ED0-\u0ED9]",
+  limb: "[\u1946-\u194F]",
+  mlym: "[\u0D66-\u0D6F]",
+  mong: "[\u1810-\u1819]",
+  mymr: "[\u1040-\u1049]",
+  orya: "[\u0B66-\u0B6F]",
+  tamldec: "[\u0BE6-\u0BEF]",
+  telu: "[\u0C66-\u0C6F]",
+  thai: "[\u0E50-\u0E59]",
+  tibt: "[\u0F20-\u0F29]",
+  latn: "\\d"
+};
+
+const numberingSystemsUTF16 = {
+  arab: [1632, 1641],
+  arabext: [1776, 1785],
+  bali: [6992, 7001],
+  beng: [2534, 2543],
+  deva: [2406, 2415],
+  fullwide: [65296, 65303],
+  gujr: [2790, 2799],
+  khmr: [6112, 6121],
+  knda: [3302, 3311],
+  laoo: [3792, 3801],
+  limb: [6470, 6479],
+  mlym: [3430, 3439],
+  mong: [6160, 6169],
+  mymr: [4160, 4169],
+  orya: [2918, 2927],
+  tamldec: [3046, 3055],
+  telu: [3174, 3183],
+  thai: [3664, 3673],
+  tibt: [3872, 3881]
+};
+
+// eslint-disable-next-line
+const hanidecChars = numberingSystems.hanidec.replace(/[\[|\]]/g, "").split("");
+
+export function parseDigits(str) {
+  let value = parseInt(str, 10);
+  if (isNaN(value)) {
+    value = "";
+    for (let i = 0; i < str.length; i++) {
+      const code = str.charCodeAt(i);
+
+      if (str[i].search(numberingSystems.hanidec) !== -1) {
+        value += hanidecChars.indexOf(str[i]);
+      } else {
+        for (const key in numberingSystemsUTF16) {
+          const [min, max] = numberingSystemsUTF16[key];
+          if (code >= min && code <= max) {
+            value += code - min;
+          }
+        }
+      }
+    }
+    return parseInt(value, 10);
+  } else {
+    return value;
+  }
+}
+
+export function digitRegex({ numberingSystem }, append = "") {
+  return new RegExp(`${numberingSystems[numberingSystem || "latn"]}${append}`);
+}

node_modules/luxon/src/impl/english.js

@@ -0,0 +1,231 @@
+import * as Formats from "./formats.js";
+import { pick } from "./util.js";
+
+function stringify(obj) {
+  return JSON.stringify(obj, Object.keys(obj).sort());
+}
+
+/**
+ * @private
+ */
+
+export const monthsLong = [
+  "January",
+  "February",
+  "March",
+  "April",
+  "May",
+  "June",
+  "July",
+  "August",
+  "September",
+  "October",
+  "November",
+  "December"
+];
+
+export const monthsShort = [
+  "Jan",
+  "Feb",
+  "Mar",
+  "Apr",
+  "May",
+  "Jun",
+  "Jul",
+  "Aug",
+  "Sep",
+  "Oct",
+  "Nov",
+  "Dec"
+];
+
+export const monthsNarrow = ["J", "F", "M", "A", "M", "J", "J", "A", "S", "O", "N", "D"];
+
+export function months(length) {
+  switch (length) {
+    case "narrow":
+      return monthsNarrow;
+    case "short":
+      return monthsShort;
+    case "long":
+      return monthsLong;
+    case "numeric":
+      return ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"];
+    case "2-digit":
+      return ["01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12"];
+    default:
+      return null;
+  }
+}
+
+export const weekdaysLong = [
+  "Monday",
+  "Tuesday",
+  "Wednesday",
+  "Thursday",
+  "Friday",
+  "Saturday",
+  "Sunday"
+];
+
+export const weekdaysShort = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"];
+
+export const weekdaysNarrow = ["M", "T", "W", "T", "F", "S", "S"];
+
+export function weekdays(length) {
+  switch (length) {
+    case "narrow":
+      return weekdaysNarrow;
+    case "short":
+      return weekdaysShort;
+    case "long":
+      return weekdaysLong;
+    case "numeric":
+      return ["1", "2", "3", "4", "5", "6", "7"];
+    default:
+      return null;
+  }
+}
+
+export const meridiems = ["AM", "PM"];
+
+export const erasLong = ["Before Christ", "Anno Domini"];
+
+export const erasShort = ["BC", "AD"];
+
+export const erasNarrow = ["B", "A"];
+
+export function eras(length) {
+  switch (length) {
+    case "narrow":
+      return erasNarrow;
+    case "short":
+      return erasShort;
+    case "long":
+      return erasLong;
+    default:
+      return null;
+  }
+}
+
+export function meridiemForDateTime(dt) {
+  return meridiems[dt.hour < 12 ? 0 : 1];
+}
+
+export function weekdayForDateTime(dt, length) {
+  return weekdays(length)[dt.weekday - 1];
+}
+
+export function monthForDateTime(dt, length) {
+  return months(length)[dt.month - 1];
+}
+
+export function eraForDateTime(dt, length) {
+  return eras(length)[dt.year < 0 ? 0 : 1];
+}
+
+export function formatRelativeTime(unit, count, numeric = "always", narrow = false) {
+  const units = {
+    years: ["year", "yr."],
+    quarters: ["quarter", "qtr."],
+    months: ["month", "mo."],
+    weeks: ["week", "wk."],
+    days: ["day", "day", "days"],
+    hours: ["hour", "hr."],
+    minutes: ["minute", "min."],
+    seconds: ["second", "sec."]
+  };
+
+  const lastable = ["hours", "minutes", "seconds"].indexOf(unit) === -1;
+
+  if (numeric === "auto" && lastable) {
+    const isDay = unit === "days";
+    switch (count) {
+      case 1:
+        return isDay ? "tomorrow" : `next ${units[unit][0]}`;
+      case -1:
+        return isDay ? "yesterday" : `last ${units[unit][0]}`;
+      case 0:
+        return isDay ? "today" : `this ${units[unit][0]}`;
+      default: // fall through
+    }
+  }
+
+  const isInPast = Object.is(count, -0) || count < 0,
+    fmtValue = Math.abs(count),
+    singular = fmtValue === 1,
+    lilUnits = units[unit],
+    fmtUnit = narrow
+      ? singular
+        ? lilUnits[1]
+        : lilUnits[2] || lilUnits[1]
+      : singular
+        ? units[unit][0]
+        : unit;
+  return isInPast ? `${fmtValue} ${fmtUnit} ago` : `in ${fmtValue} ${fmtUnit}`;
+}
+
+export function formatString(knownFormat) {
+  // these all have the offsets removed because we don't have access to them
+  // without all the intl stuff this is backfilling
+  const filtered = pick(knownFormat, [
+      "weekday",
+      "era",
+      "year",
+      "month",
+      "day",
+      "hour",
+      "minute",
+      "second",
+      "timeZoneName",
+      "hour12"
+    ]),
+    key = stringify(filtered),
+    dateTimeHuge = "EEEE, LLLL d, yyyy, h:mm a";
+  switch (key) {
+    case stringify(Formats.DATE_SHORT):
+      return "M/d/yyyy";
+    case stringify(Formats.DATE_MED):
+      return "LLL d, yyyy";
+    case stringify(Formats.DATE_FULL):
+      return "LLLL d, yyyy";
+    case stringify(Formats.DATE_HUGE):
+      return "EEEE, LLLL d, yyyy";
+    case stringify(Formats.TIME_SIMPLE):
+      return "h:mm a";
+    case stringify(Formats.TIME_WITH_SECONDS):
+      return "h:mm:ss a";
+    case stringify(Formats.TIME_WITH_SHORT_OFFSET):
+      return "h:mm a";
+    case stringify(Formats.TIME_WITH_LONG_OFFSET):
+      return "h:mm a";
+    case stringify(Formats.TIME_24_SIMPLE):
+      return "HH:mm";
+    case stringify(Formats.TIME_24_WITH_SECONDS):
+      return "HH:mm:ss";
+    case stringify(Formats.TIME_24_WITH_SHORT_OFFSET):
+      return "HH:mm";
+    case stringify(Formats.TIME_24_WITH_LONG_OFFSET):
+      return "HH:mm";
+    case stringify(Formats.DATETIME_SHORT):
+      return "M/d/yyyy, h:mm a";
+    case stringify(Formats.DATETIME_MED):
+      return "LLL d, yyyy, h:mm a";
+    case stringify(Formats.DATETIME_FULL):
+      return "LLLL d, yyyy, h:mm a";
+    case stringify(Formats.DATETIME_HUGE):
+      return dateTimeHuge;
+    case stringify(Formats.DATETIME_SHORT_WITH_SECONDS):
+      return "M/d/yyyy, h:mm:ss a";
+    case stringify(Formats.DATETIME_MED_WITH_SECONDS):
+      return "LLL d, yyyy, h:mm:ss a";
+    case stringify(Formats.DATETIME_MED_WITH_WEEKDAY):
+      return "EEE, d LLL yyyy, h:mm a";
+    case stringify(Formats.DATETIME_FULL_WITH_SECONDS):
+      return "LLLL d, yyyy, h:mm:ss a";
+    case stringify(Formats.DATETIME_HUGE_WITH_SECONDS):
+      return "EEEE, LLLL d, yyyy, h:mm:ss a";
+    default:
+      return dateTimeHuge;
+  }
+}

node_modules/luxon/src/impl/formats.js

@@ -0,0 +1,184 @@
+/**
+ * @private
+ */
+
+const n = "numeric",
+  s = "short",
+  l = "long";
+
+export const DATE_SHORT = {
+  year: n,
+  month: n,
+  day: n
+};
+
+export const DATE_MED = {
+  year: n,
+  month: s,
+  day: n
+};
+
+export const DATE_FULL = {
+  year: n,
+  month: l,
+  day: n
+};
+
+export const DATE_HUGE = {
+  year: n,
+  month: l,
+  day: n,
+  weekday: l
+};
+
+export const TIME_SIMPLE = {
+  hour: n,
+  minute: n
+};
+
+export const TIME_WITH_SECONDS = {
+  hour: n,
+  minute: n,
+  second: n
+};
+
+export const TIME_WITH_SHORT_OFFSET = {
+  hour: n,
+  minute: n,
+  second: n,
+  timeZoneName: s
+};
+
+export const TIME_WITH_LONG_OFFSET = {
+  hour: n,
+  minute: n,
+  second: n,
+  timeZoneName: l
+};
+
+export const TIME_24_SIMPLE = {
+  hour: n,
+  minute: n,
+  hour12: false
+};
+
+/**
+ * {@link toLocaleString}; format like '09:30:23', always 24-hour.
+ */
+export const TIME_24_WITH_SECONDS = {
+  hour: n,
+  minute: n,
+  second: n,
+  hour12: false
+};
+
+/**
+ * {@link toLocaleString}; format like '09:30:23 EDT', always 24-hour.
+ */
+export const TIME_24_WITH_SHORT_OFFSET = {
+  hour: n,
+  minute: n,
+  second: n,
+  hour12: false,
+  timeZoneName: s
+};
+
+/**
+ * {@link toLocaleString}; format like '09:30:23 Eastern Daylight Time', always 24-hour.
+ */
+export const TIME_24_WITH_LONG_OFFSET = {
+  hour: n,
+  minute: n,
+  second: n,
+  hour12: false,
+  timeZoneName: l
+};
+
+/**
+ * {@link toLocaleString}; format like '10/14/1983, 9:30 AM'. Only 12-hour if the locale is.
+ */
+export const DATETIME_SHORT = {
+  year: n,
+  month: n,
+  day: n,
+  hour: n,
+  minute: n
+};
+
+/**
+ * {@link toLocaleString}; format like '10/14/1983, 9:30:33 AM'. Only 12-hour if the locale is.
+ */
+export const DATETIME_SHORT_WITH_SECONDS = {
+  year: n,
+  month: n,
+  day: n,
+  hour: n,
+  minute: n,
+  second: n
+};
+
+export const DATETIME_MED = {
+  year: n,
+  month: s,
+  day: n,
+  hour: n,
+  minute: n
+};
+
+export const DATETIME_MED_WITH_SECONDS = {
+  year: n,
+  month: s,
+  day: n,
+  hour: n,
+  minute: n,
+  second: n
+};
+
+export const DATETIME_MED_WITH_WEEKDAY = {
+  year: n,
+  month: s,
+  day: n,
+  weekday: s,
+  hour: n,
+  minute: n
+};
+
+export const DATETIME_FULL = {
+  year: n,
+  month: l,
+  day: n,
+  hour: n,
+  minute: n,
+  timeZoneName: s
+};
+
+export const DATETIME_FULL_WITH_SECONDS = {
+  year: n,
+  month: l,
+  day: n,
+  hour: n,
+  minute: n,
+  second: n,
+  timeZoneName: s
+};
+
+export const DATETIME_HUGE = {
+  year: n,
+  month: l,
+  day: n,
+  weekday: l,
+  hour: n,
+  minute: n,
+  timeZoneName: l
+};
+
+export const DATETIME_HUGE_WITH_SECONDS = {
+  year: n,
+  month: l,
+  day: n,
+  weekday: l,
+  hour: n,
+  minute: n,
+  second: n,
+  timeZoneName: l
+};

node_modules/luxon/src/impl/formatter.js

@@ -0,0 +1,386 @@
+import * as English from "./english.js";
+import * as Formats from "./formats.js";
+import { hasFormatToParts, padStart } from "./util.js";
+
+function stringifyTokens(splits, tokenToString) {
+  let s = "";
+  for (const token of splits) {
+    if (token.literal) {
+      s += token.val;
+    } else {
+      s += tokenToString(token.val);
+    }
+  }
+  return s;
+}
+
+const macroTokenToFormatOpts = {
+  D: Formats.DATE_SHORT,
+  DD: Formats.DATE_MED,
+  DDD: Formats.DATE_FULL,
+  DDDD: Formats.DATE_HUGE,
+  t: Formats.TIME_SIMPLE,
+  tt: Formats.TIME_WITH_SECONDS,
+  ttt: Formats.TIME_WITH_SHORT_OFFSET,
+  tttt: Formats.TIME_WITH_LONG_OFFSET,
+  T: Formats.TIME_24_SIMPLE,
+  TT: Formats.TIME_24_WITH_SECONDS,
+  TTT: Formats.TIME_24_WITH_SHORT_OFFSET,
+  TTTT: Formats.TIME_24_WITH_LONG_OFFSET,
+  f: Formats.DATETIME_SHORT,
+  ff: Formats.DATETIME_MED,
+  fff: Formats.DATETIME_FULL,
+  ffff: Formats.DATETIME_HUGE,
+  F: Formats.DATETIME_SHORT_WITH_SECONDS,
+  FF: Formats.DATETIME_MED_WITH_SECONDS,
+  FFF: Formats.DATETIME_FULL_WITH_SECONDS,
+  FFFF: Formats.DATETIME_HUGE_WITH_SECONDS
+};
+
+/**
+ * @private
+ */
+
+export default class Formatter {
+  static create(locale, opts = {}) {
+    return new Formatter(locale, opts);
+  }
+
+  static parseFormat(fmt) {
+    let current = null,
+      currentFull = "",
+      bracketed = false;
+    const splits = [];
+    for (let i = 0; i < fmt.length; i++) {
+      const c = fmt.charAt(i);
+      if (c === "'") {
+        if (currentFull.length > 0) {
+          splits.push({ literal: bracketed, val: currentFull });
+        }
+        current = null;
+        currentFull = "";
+        bracketed = !bracketed;
+      } else if (bracketed) {
+        currentFull += c;
+      } else if (c === current) {
+        currentFull += c;
+      } else {
+        if (currentFull.length > 0) {
+          splits.push({ literal: false, val: currentFull });
+        }
+        currentFull = c;
+        current = c;
+      }
+    }
+
+    if (currentFull.length > 0) {
+      splits.push({ literal: bracketed, val: currentFull });
+    }
+
+    return splits;
+  }
+
+  static macroTokenToFormatOpts(token) {
+    return macroTokenToFormatOpts[token];
+  }
+
+  constructor(locale, formatOpts) {
+    this.opts = formatOpts;
+    this.loc = locale;
+    this.systemLoc = null;
+  }
+
+  formatWithSystemDefault(dt, opts) {
+    if (this.systemLoc === null) {
+      this.systemLoc = this.loc.redefaultToSystem();
+    }
+    const df = this.systemLoc.dtFormatter(dt, Object.assign({}, this.opts, opts));
+    return df.format();
+  }
+
+  formatDateTime(dt, opts = {}) {
+    const df = this.loc.dtFormatter(dt, Object.assign({}, this.opts, opts));
+    return df.format();
+  }
+
+  formatDateTimeParts(dt, opts = {}) {
+    const df = this.loc.dtFormatter(dt, Object.assign({}, this.opts, opts));
+    return df.formatToParts();
+  }
+
+  resolvedOptions(dt, opts = {}) {
+    const df = this.loc.dtFormatter(dt, Object.assign({}, this.opts, opts));
+    return df.resolvedOptions();
+  }
+
+  num(n, p = 0) {
+    // we get some perf out of doing this here, annoyingly
+    if (this.opts.forceSimple) {
+      return padStart(n, p);
+    }
+
+    const opts = Object.assign({}, this.opts);
+
+    if (p > 0) {
+      opts.padTo = p;
+    }
+
+    return this.loc.numberFormatter(opts).format(n);
+  }
+
+  formatDateTimeFromString(dt, fmt) {
+    const knownEnglish = this.loc.listingMode() === "en",
+      useDateTimeFormatter =
+        this.loc.outputCalendar && this.loc.outputCalendar !== "gregory" && hasFormatToParts(),
+      string = (opts, extract) => this.loc.extract(dt, opts, extract),
+      formatOffset = opts => {
+        if (dt.isOffsetFixed && dt.offset === 0 && opts.allowZ) {
+          return "Z";
+        }
+
+        return dt.isValid ? dt.zone.formatOffset(dt.ts, opts.format) : "";
+      },
+      meridiem = () =>
+        knownEnglish
+          ? English.meridiemForDateTime(dt)
+          : string({ hour: "numeric", hour12: true }, "dayperiod"),
+      month = (length, standalone) =>
+        knownEnglish
+          ? English.monthForDateTime(dt, length)
+          : string(standalone ? { month: length } : { month: length, day: "numeric" }, "month"),
+      weekday = (length, standalone) =>
+        knownEnglish
+          ? English.weekdayForDateTime(dt, length)
+          : string(
+              standalone ? { weekday: length } : { weekday: length, month: "long", day: "numeric" },
+              "weekday"
+            ),
+      maybeMacro = token => {
+        const formatOpts = Formatter.macroTokenToFormatOpts(token);
+        if (formatOpts) {
+          return this.formatWithSystemDefault(dt, formatOpts);
+        } else {
+          return token;
+        }
+      },
+      era = length =>
+        knownEnglish ? English.eraForDateTime(dt, length) : string({ era: length }, "era"),
+      tokenToString = token => {
+        // Where possible: http://cldr.unicode.org/translation/date-time#TOC-Stand-Alone-vs.-Format-Styles
+        switch (token) {
+          // ms
+          case "S":
+            return this.num(dt.millisecond);
+          case "u":
+          // falls through
+          case "SSS":
+            return this.num(dt.millisecond, 3);
+          // seconds
+          case "s":
+            return this.num(dt.second);
+          case "ss":
+            return this.num(dt.second, 2);
+          // minutes
+          case "m":
+            return this.num(dt.minute);
+          case "mm":
+            return this.num(dt.minute, 2);
+          // hours
+          case "h":
+            return this.num(dt.hour % 12 === 0 ? 12 : dt.hour % 12);
+          case "hh":
+            return this.num(dt.hour % 12 === 0 ? 12 : dt.hour % 12, 2);
+          case "H":
+            return this.num(dt.hour);
+          case "HH":
+            return this.num(dt.hour, 2);
+          // offset
+          case "Z":
+            // like +6
+            return formatOffset({ format: "narrow", allowZ: this.opts.allowZ });
+          case "ZZ":
+            // like +06:00
+            return formatOffset({ format: "short", allowZ: this.opts.allowZ });
+          case "ZZZ":
+            // like +0600
+            return formatOffset({ format: "techie", allowZ: false });
+          case "ZZZZ":
+            // like EST
+            return dt.zone.offsetName(dt.ts, { format: "short", locale: this.loc.locale });
+          case "ZZZZZ":
+            // like Eastern Standard Time
+            return dt.zone.offsetName(dt.ts, { format: "long", locale: this.loc.locale });
+          // zone
+          case "z":
+            // like America/New_York
+            return dt.zoneName;
+          // meridiems
+          case "a":
+            return meridiem();
+          // dates
+          case "d":
+            return useDateTimeFormatter ? string({ day: "numeric" }, "day") : this.num(dt.day);
+          case "dd":
+            return useDateTimeFormatter ? string({ day: "2-digit" }, "day") : this.num(dt.day, 2);
+          // weekdays - standalone
+          case "c":
+            // like 1
+            return this.num(dt.weekday);
+          case "ccc":
+            // like 'Tues'
+            return weekday("short", true);
+          case "cccc":
+            // like 'Tuesday'
+            return weekday("long", true);
+          case "ccccc":
+            // like 'T'
+            return weekday("narrow", true);
+          // weekdays - format
+          case "E":
+            // like 1
+            return this.num(dt.weekday);
+          case "EEE":
+            // like 'Tues'
+            return weekday("short", false);
+          case "EEEE":
+            // like 'Tuesday'
+            return weekday("long", false);
+          case "EEEEE":
+            // like 'T'
+            return weekday("narrow", false);
+          // months - standalone
+          case "L":
+            // like 1
+            return useDateTimeFormatter
+              ? string({ month: "numeric", day: "numeric" }, "month")
+              : this.num(dt.month);
+          case "LL":
+            // like 01, doesn't seem to work
+            return useDateTimeFormatter
+              ? string({ month: "2-digit", day: "numeric" }, "month")
+              : this.num(dt.month, 2);
+          case "LLL":
+            // like Jan
+            return month("short", true);
+          case "LLLL":
+            // like January
+            return month("long", true);
+          case "LLLLL":
+            // like J
+            return month("narrow", true);
+          // months - format
+          case "M":
+            // like 1
+            return useDateTimeFormatter
+              ? string({ month: "numeric" }, "month")
+              : this.num(dt.month);
+          case "MM":
+            // like 01
+            return useDateTimeFormatter
+              ? string({ month: "2-digit" }, "month")
+              : this.num(dt.month, 2);
+          case "MMM":
+            // like Jan
+            return month("short", false);
+          case "MMMM":
+            // like January
+            return month("long", false);
+          case "MMMMM":
+            // like J
+            return month("narrow", false);
+          // years
+          case "y":
+            // like 2014
+            return useDateTimeFormatter ? string({ year: "numeric" }, "year") : this.num(dt.year);
+          case "yy":
+            // like 14
+            return useDateTimeFormatter
+              ? string({ year: "2-digit" }, "year")
+              : this.num(dt.year.toString().slice(-2), 2);
+          case "yyyy":
+            // like 0012
+            return useDateTimeFormatter
+              ? string({ year: "numeric" }, "year")
+              : this.num(dt.year, 4);
+          case "yyyyyy":
+            // like 000012
+            return useDateTimeFormatter
+              ? string({ year: "numeric" }, "year")
+              : this.num(dt.year, 6);
+          // eras
+          case "G":
+            // like AD
+            return era("short");
+          case "GG":
+            // like Anno Domini
+            return era("long");
+          case "GGGGG":
+            return era("narrow");
+          case "kk":
+            return this.num(dt.weekYear.toString().slice(-2), 2);
+          case "kkkk":
+            return this.num(dt.weekYear, 4);
+          case "W":
+            return this.num(dt.weekNumber);
+          case "WW":
+            return this.num(dt.weekNumber, 2);
+          case "o":
+            return this.num(dt.ordinal);
+          case "ooo":
+            return this.num(dt.ordinal, 3);
+          case "q":
+            // like 1
+            return this.num(dt.quarter);
+          case "qq":
+            // like 01
+            return this.num(dt.quarter, 2);
+          case "X":
+            return this.num(Math.floor(dt.ts / 1000));
+          case "x":
+            return this.num(dt.ts);
+          default:
+            return maybeMacro(token);
+        }
+      };
+
+    return stringifyTokens(Formatter.parseFormat(fmt), tokenToString);
+  }
+
+  formatDurationFromString(dur, fmt) {
+    const tokenToField = token => {
+        switch (token[0]) {
+          case "S":
+            return "millisecond";
+          case "s":
+            return "second";
+          case "m":
+            return "minute";
+          case "h":
+            return "hour";
+          case "d":
+            return "day";
+          case "M":
+            return "month";
+          case "y":
+            return "year";
+          default:
+            return null;
+        }
+      },
+      tokenToString = lildur => token => {
+        const mapped = tokenToField(token);
+        if (mapped) {
+          return this.num(lildur.get(mapped), token.length);
+        } else {
+          return token;
+        }
+      },
+      tokens = Formatter.parseFormat(fmt),
+      realTokens = tokens.reduce(
+        (found, { literal, val }) => (literal ? found : found.concat(val)),
+        []
+      ),
+      collapsed = dur.shiftTo(...realTokens.map(tokenToField).filter(t => t));
+    return stringifyTokens(tokens, tokenToString(collapsed));
+  }
+}

node_modules/luxon/src/impl/invalid.js

@@ -0,0 +1,14 @@
+export default class Invalid {
+  constructor(reason, explanation) {
+    this.reason = reason;
+    this.explanation = explanation;
+  }
+
+  toMessage() {
+    if (this.explanation) {
+      return `${this.reason}: ${this.explanation}`;
+    } else {
+      return this.reason;
+    }
+  }
+}

node_modules/luxon/src/impl/locale.js

@@ -0,0 +1,468 @@
+import { hasFormatToParts, hasIntl, padStart, roundTo, hasRelative } from "./util.js";
+import * as English from "./english.js";
+import Settings from "../settings.js";
+import DateTime from "../datetime.js";
+import Formatter from "./formatter.js";
+
+let intlDTCache = {};
+function getCachedDTF(locString, opts = {}) {
+  const key = JSON.stringify([locString, opts]);
+  let dtf = intlDTCache[key];
+  if (!dtf) {
+    dtf = new Intl.DateTimeFormat(locString, opts);
+    intlDTCache[key] = dtf;
+  }
+  return dtf;
+}
+
+let intlNumCache = {};
+function getCachedINF(locString, opts = {}) {
+  const key = JSON.stringify([locString, opts]);
+  let inf = intlNumCache[key];
+  if (!inf) {
+    inf = new Intl.NumberFormat(locString, opts);
+    intlNumCache[key] = inf;
+  }
+  return inf;
+}
+
+let intlRelCache = {};
+function getCachedRTF(locString, opts = {}) {
+  const key = JSON.stringify([locString, opts]);
+  let inf = intlRelCache[key];
+  if (!inf) {
+    inf = new Intl.RelativeTimeFormat(locString, opts);
+    intlRelCache[key] = inf;
+  }
+  return inf;
+}
+
+let sysLocaleCache = null;
+function systemLocale() {
+  if (sysLocaleCache) {
+    return sysLocaleCache;
+  } else if (hasIntl()) {
+    const computedSys = new Intl.DateTimeFormat().resolvedOptions().locale;
+    // node sometimes defaults to "und". Override that because that is dumb
+    sysLocaleCache = !computedSys || computedSys === "und" ? "en-US" : computedSys;
+    return sysLocaleCache;
+  } else {
+    sysLocaleCache = "en-US";
+    return sysLocaleCache;
+  }
+}
+
+function parseLocaleString(localeStr) {
+  // I really want to avoid writing a BCP 47 parser
+  // see, e.g. https://github.com/wooorm/bcp-47
+  // Instead, we'll do this:
+
+  // a) if the string has no -u extensions, just leave it alone
+  // b) if it does, use Intl to resolve everything
+  // c) if Intl fails, try again without the -u
+
+  const uIndex = localeStr.indexOf("-u-");
+  if (uIndex === -1) {
+    return [localeStr];
+  } else {
+    let options;
+    const smaller = localeStr.substring(0, uIndex);
+    try {
+      options = getCachedDTF(localeStr).resolvedOptions();
+    } catch (e) {
+      options = getCachedDTF(smaller).resolvedOptions();
+    }
+
+    const { numberingSystem, calendar } = options;
+    // return the smaller one so that we can append the calendar and numbering overrides to it
+    return [smaller, numberingSystem, calendar];
+  }
+}
+
+function intlConfigString(localeStr, numberingSystem, outputCalendar) {
+  if (hasIntl()) {
+    if (outputCalendar || numberingSystem) {
+      localeStr += "-u";
+
+      if (outputCalendar) {
+        localeStr += `-ca-${outputCalendar}`;
+      }
+
+      if (numberingSystem) {
+        localeStr += `-nu-${numberingSystem}`;
+      }
+      return localeStr;
+    } else {
+      return localeStr;
+    }
+  } else {
+    return [];
+  }
+}
+
+function mapMonths(f) {
+  const ms = [];
+  for (let i = 1; i <= 12; i++) {
+    const dt = DateTime.utc(2016, i, 1);
+    ms.push(f(dt));
+  }
+  return ms;
+}
+
+function mapWeekdays(f) {
+  const ms = [];
+  for (let i = 1; i <= 7; i++) {
+    const dt = DateTime.utc(2016, 11, 13 + i);
+    ms.push(f(dt));
+  }
+  return ms;
+}
+
+function listStuff(loc, length, defaultOK, englishFn, intlFn) {
+  const mode = loc.listingMode(defaultOK);
+
+  if (mode === "error") {
+    return null;
+  } else if (mode === "en") {
+    return englishFn(length);
+  } else {
+    return intlFn(length);
+  }
+}
+
+function supportsFastNumbers(loc) {
+  if (loc.numberingSystem && loc.numberingSystem !== "latn") {
+    return false;
+  } else {
+    return (
+      loc.numberingSystem === "latn" ||
+      !loc.locale ||
+      loc.locale.startsWith("en") ||
+      (hasIntl() && new Intl.DateTimeFormat(loc.intl).resolvedOptions().numberingSystem === "latn")
+    );
+  }
+}
+
+/**
+ * @private
+ */
+
+class PolyNumberFormatter {
+  constructor(intl, forceSimple, opts) {
+    this.padTo = opts.padTo || 0;
+    this.floor = opts.floor || false;
+
+    if (!forceSimple && hasIntl()) {
+      const intlOpts = { useGrouping: false };
+      if (opts.padTo > 0) intlOpts.minimumIntegerDigits = opts.padTo;
+      this.inf = getCachedINF(intl, intlOpts);
+    }
+  }
+
+  format(i) {
+    if (this.inf) {
+      const fixed = this.floor ? Math.floor(i) : i;
+      return this.inf.format(fixed);
+    } else {
+      // to match the browser's numberformatter defaults
+      const fixed = this.floor ? Math.floor(i) : roundTo(i, 3);
+      return padStart(fixed, this.padTo);
+    }
+  }
+}
+
+/**
+ * @private
+ */
+
+class PolyDateFormatter {
+  constructor(dt, intl, opts) {
+    this.opts = opts;
+    this.hasIntl = hasIntl();
+
+    let z;
+    if (dt.zone.universal && this.hasIntl) {
+      // Chromium doesn't support fixed-offset zones like Etc/GMT+8 in its formatter,
+      // See https://bugs.chromium.org/p/chromium/issues/detail?id=364374.
+      // So we have to make do. Two cases:
+      // 1. The format options tell us to show the zone. We can't do that, so the best
+      // we can do is format the date in UTC.
+      // 2. The format options don't tell us to show the zone. Then we can adjust them
+      // the time and tell the formatter to show it to us in UTC, so that the time is right
+      // and the bad zone doesn't show up.
+      // We can clean all this up when Chrome fixes this.
+      z = "UTC";
+      if (opts.timeZoneName) {
+        this.dt = dt;
+      } else {
+        this.dt = dt.offset === 0 ? dt : DateTime.fromMillis(dt.ts + dt.offset * 60 * 1000);
+      }
+    } else if (dt.zone.type === "local") {
+      this.dt = dt;
+    } else {
+      this.dt = dt;
+      z = dt.zone.name;
+    }
+
+    if (this.hasIntl) {
+      const intlOpts = Object.assign({}, this.opts);
+      if (z) {
+        intlOpts.timeZone = z;
+      }
+      this.dtf = getCachedDTF(intl, intlOpts);
+    }
+  }
+
+  format() {
+    if (this.hasIntl) {
+      return this.dtf.format(this.dt.toJSDate());
+    } else {
+      const tokenFormat = English.formatString(this.opts),
+        loc = Locale.create("en-US");
+      return Formatter.create(loc).formatDateTimeFromString(this.dt, tokenFormat);
+    }
+  }
+
+  formatToParts() {
+    if (this.hasIntl && hasFormatToParts()) {
+      return this.dtf.formatToParts(this.dt.toJSDate());
+    } else {
+      // This is kind of a cop out. We actually could do this for English. However, we couldn't do it for intl strings
+      // and IMO it's too weird to have an uncanny valley like that
+      return [];
+    }
+  }
+
+  resolvedOptions() {
+    if (this.hasIntl) {
+      return this.dtf.resolvedOptions();
+    } else {
+      return {
+        locale: "en-US",
+        numberingSystem: "latn",
+        outputCalendar: "gregory"
+      };
+    }
+  }
+}
+
+/**
+ * @private
+ */
+class PolyRelFormatter {
+  constructor(intl, isEnglish, opts) {
+    this.opts = Object.assign({ style: "long" }, opts);
+    if (!isEnglish && hasRelative()) {
+      this.rtf = getCachedRTF(intl, opts);
+    }
+  }
+
+  format(count, unit) {
+    if (this.rtf) {
+      return this.rtf.format(count, unit);
+    } else {
+      return English.formatRelativeTime(unit, count, this.opts.numeric, this.opts.style !== "long");
+    }
+  }
+
+  formatToParts(count, unit) {
+    if (this.rtf) {
+      return this.rtf.formatToParts(count, unit);
+    } else {
+      return [];
+    }
+  }
+}
+
+/**
+ * @private
+ */
+
+export default class Locale {
+  static fromOpts(opts) {
+    return Locale.create(opts.locale, opts.numberingSystem, opts.outputCalendar, opts.defaultToEN);
+  }
+
+  static create(locale, numberingSystem, outputCalendar, defaultToEN = false) {
+    const specifiedLocale = locale || Settings.defaultLocale,
+      // the system locale is useful for human readable strings but annoying for parsing/formatting known formats
+      localeR = specifiedLocale || (defaultToEN ? "en-US" : systemLocale()),
+      numberingSystemR = numberingSystem || Settings.defaultNumberingSystem,
+      outputCalendarR = outputCalendar || Settings.defaultOutputCalendar;
+    return new Locale(localeR, numberingSystemR, outputCalendarR, specifiedLocale);
+  }
+
+  static resetCache() {
+    sysLocaleCache = null;
+    intlDTCache = {};
+    intlNumCache = {};
+    intlRelCache = {};
+  }
+
+  static fromObject({ locale, numberingSystem, outputCalendar } = {}) {
+    return Locale.create(locale, numberingSystem, outputCalendar);
+  }
+
+  constructor(locale, numbering, outputCalendar, specifiedLocale) {
+    const [parsedLocale, parsedNumberingSystem, parsedOutputCalendar] = parseLocaleString(locale);
+
+    this.locale = parsedLocale;
+    this.numberingSystem = numbering || parsedNumberingSystem || null;
+    this.outputCalendar = outputCalendar || parsedOutputCalendar || null;
+    this.intl = intlConfigString(this.locale, this.numberingSystem, this.outputCalendar);
+
+    this.weekdaysCache = { format: {}, standalone: {} };
+    this.monthsCache = { format: {}, standalone: {} };
+    this.meridiemCache = null;
+    this.eraCache = {};
+
+    this.specifiedLocale = specifiedLocale;
+    this.fastNumbersCached = null;
+  }
+
+  get fastNumbers() {
+    if (this.fastNumbersCached == null) {
+      this.fastNumbersCached = supportsFastNumbers(this);
+    }
+
+    return this.fastNumbersCached;
+  }
+
+  listingMode(defaultOK = true) {
+    const intl = hasIntl(),
+      hasFTP = intl && hasFormatToParts(),
+      isActuallyEn = this.isEnglish(),
+      hasNoWeirdness =
+        (this.numberingSystem === null || this.numberingSystem === "latn") &&
+        (this.outputCalendar === null || this.outputCalendar === "gregory");
+
+    if (!hasFTP && !(isActuallyEn && hasNoWeirdness) && !defaultOK) {
+      return "error";
+    } else if (!hasFTP || (isActuallyEn && hasNoWeirdness)) {
+      return "en";
+    } else {
+      return "intl";
+    }
+  }
+
+  clone(alts) {
+    if (!alts || Object.getOwnPropertyNames(alts).length === 0) {
+      return this;
+    } else {
+      return Locale.create(
+        alts.locale || this.specifiedLocale,
+        alts.numberingSystem || this.numberingSystem,
+        alts.outputCalendar || this.outputCalendar,
+        alts.defaultToEN || false
+      );
+    }
+  }
+
+  redefaultToEN(alts = {}) {
+    return this.clone(Object.assign({}, alts, { defaultToEN: true }));
+  }
+
+  redefaultToSystem(alts = {}) {
+    return this.clone(Object.assign({}, alts, { defaultToEN: false }));
+  }
+
+  months(length, format = false, defaultOK = true) {
+    return listStuff(this, length, defaultOK, English.months, () => {
+      const intl = format ? { month: length, day: "numeric" } : { month: length },
+        formatStr = format ? "format" : "standalone";
+      if (!this.monthsCache[formatStr][length]) {
+        this.monthsCache[formatStr][length] = mapMonths(dt => this.extract(dt, intl, "month"));
+      }
+      return this.monthsCache[formatStr][length];
+    });
+  }
+
+  weekdays(length, format = false, defaultOK = true) {
+    return listStuff(this, length, defaultOK, English.weekdays, () => {
+      const intl = format
+          ? { weekday: length, year: "numeric", month: "long", day: "numeric" }
+          : { weekday: length },
+        formatStr = format ? "format" : "standalone";
+      if (!this.weekdaysCache[formatStr][length]) {
+        this.weekdaysCache[formatStr][length] = mapWeekdays(dt =>
+          this.extract(dt, intl, "weekday")
+        );
+      }
+      return this.weekdaysCache[formatStr][length];
+    });
+  }
+
+  meridiems(defaultOK = true) {
+    return listStuff(
+      this,
+      undefined,
+      defaultOK,
+      () => English.meridiems,
+      () => {
+        // In theory there could be aribitrary day periods. We're gonna assume there are exactly two
+        // for AM and PM. This is probably wrong, but it's makes parsing way easier.
+        if (!this.meridiemCache) {
+          const intl = { hour: "numeric", hour12: true };
+          this.meridiemCache = [DateTime.utc(2016, 11, 13, 9), DateTime.utc(2016, 11, 13, 19)].map(
+            dt => this.extract(dt, intl, "dayperiod")
+          );
+        }
+
+        return this.meridiemCache;
+      }
+    );
+  }
+
+  eras(length, defaultOK = true) {
+    return listStuff(this, length, defaultOK, English.eras, () => {
+      const intl = { era: length };
+
+      // This is utter bullshit. Different calendars are going to define eras totally differently. What I need is the minimum set of dates
+      // to definitely enumerate them.
+      if (!this.eraCache[length]) {
+        this.eraCache[length] = [DateTime.utc(-40, 1, 1), DateTime.utc(2017, 1, 1)].map(dt =>
+          this.extract(dt, intl, "era")
+        );
+      }
+
+      return this.eraCache[length];
+    });
+  }
+
+  extract(dt, intlOpts, field) {
+    const df = this.dtFormatter(dt, intlOpts),
+      results = df.formatToParts(),
+      matching = results.find(m => m.type.toLowerCase() === field);
+    return matching ? matching.value : null;
+  }
+
+  numberFormatter(opts = {}) {
+    // this forcesimple option is never used (the only caller short-circuits on it, but it seems safer to leave)
+    // (in contrast, the rest of the condition is used heavily)
+    return new PolyNumberFormatter(this.intl, opts.forceSimple || this.fastNumbers, opts);
+  }
+
+  dtFormatter(dt, intlOpts = {}) {
+    return new PolyDateFormatter(dt, this.intl, intlOpts);
+  }
+
+  relFormatter(opts = {}) {
+    return new PolyRelFormatter(this.intl, this.isEnglish(), opts);
+  }
+
+  isEnglish() {
+    return (
+      this.locale === "en" ||
+      this.locale.toLowerCase() === "en-us" ||
+      (hasIntl() && new Intl.DateTimeFormat(this.intl).resolvedOptions().locale.startsWith("en-us"))
+    );
+  }
+
+  equals(other) {
+    return (
+      this.locale === other.locale &&
+      this.numberingSystem === other.numberingSystem &&
+      this.outputCalendar === other.outputCalendar
+    );
+  }
+}

node_modules/luxon/src/impl/regexParser.js

@@ -0,0 +1,315 @@
+import {
+  untruncateYear,
+  signedOffset,
+  parseInteger,
+  parseMillis,
+  ianaRegex,
+  isUndefined
+} from "./util.js";
+import * as English from "./english.js";
+import FixedOffsetZone from "../zones/fixedOffsetZone.js";
+import IANAZone from "../zones/IANAZone.js";
+
+/*
+ * This file handles parsing for well-specified formats. Here's how it works:
+ * Two things go into parsing: a regex to match with and an extractor to take apart the groups in the match.
+ * An extractor is just a function that takes a regex match array and returns a { year: ..., month: ... } object
+ * parse() does the work of executing the regex and applying the extractor. It takes multiple regex/extractor pairs to try in sequence.
+ * Extractors can take a "cursor" representing the offset in the match to look at. This makes it easy to combine extractors.
+ * combineExtractors() does the work of combining them, keeping track of the cursor through multiple extractions.
+ * Some extractions are super dumb and simpleParse and fromStrings help DRY them.
+ */
+
+function combineRegexes(...regexes) {
+  const full = regexes.reduce((f, r) => f + r.source, "");
+  return RegExp(`^${full}$`);
+}
+
+function combineExtractors(...extractors) {
+  return m =>
+    extractors
+      .reduce(
+        ([mergedVals, mergedZone, cursor], ex) => {
+          const [val, zone, next] = ex(m, cursor);
+          return [Object.assign(mergedVals, val), mergedZone || zone, next];
+        },
+        [{}, null, 1]
+      )
+      .slice(0, 2);
+}
+
+function parse(s, ...patterns) {
+  if (s == null) {
+    return [null, null];
+  }
+
+  for (const [regex, extractor] of patterns) {
+    const m = regex.exec(s);
+    if (m) {
+      return extractor(m);
+    }
+  }
+  return [null, null];
+}
+
+function simpleParse(...keys) {
+  return (match, cursor) => {
+    const ret = {};
+    let i;
+
+    for (i = 0; i < keys.length; i++) {
+      ret[keys[i]] = parseInteger(match[cursor + i]);
+    }
+    return [ret, null, cursor + i];
+  };
+}
+
+// ISO and SQL parsing
+const offsetRegex = /(?:(Z)|([+-]\d\d)(?::?(\d\d))?)/,
+  isoTimeBaseRegex = /(\d\d)(?::?(\d\d)(?::?(\d\d)(?:[.,](\d{1,9}))?)?)?/,
+  isoTimeRegex = RegExp(`${isoTimeBaseRegex.source}${offsetRegex.source}?`),
+  isoTimeExtensionRegex = RegExp(`(?:T${isoTimeRegex.source})?`),
+  isoYmdRegex = /([+-]\d{6}|\d{4})(?:-?(\d\d)(?:-?(\d\d))?)?/,
+  isoWeekRegex = /(\d{4})-?W(\d\d)(?:-?(\d))?/,
+  isoOrdinalRegex = /(\d{4})-?(\d{3})/,
+  extractISOWeekData = simpleParse("weekYear", "weekNumber", "weekDay"),
+  extractISOOrdinalData = simpleParse("year", "ordinal"),
+  sqlYmdRegex = /(\d{4})-(\d\d)-(\d\d)/, // dumbed-down version of the ISO one
+  sqlTimeRegex = RegExp(
+    `${isoTimeBaseRegex.source} ?(?:${offsetRegex.source}|(${ianaRegex.source}))?`
+  ),
+  sqlTimeExtensionRegex = RegExp(`(?: ${sqlTimeRegex.source})?`);
+
+function int(match, pos, fallback) {
+  const m = match[pos];
+  return isUndefined(m) ? fallback : parseInteger(m);
+}
+
+function extractISOYmd(match, cursor) {
+  const item = {
+    year: int(match, cursor),
+    month: int(match, cursor + 1, 1),
+    day: int(match, cursor + 2, 1)
+  };
+
+  return [item, null, cursor + 3];
+}
+
+function extractISOTime(match, cursor) {
+  const item = {
+    hour: int(match, cursor, 0),
+    minute: int(match, cursor + 1, 0),
+    second: int(match, cursor + 2, 0),
+    millisecond: parseMillis(match[cursor + 3])
+  };
+
+  return [item, null, cursor + 4];
+}
+
+function extractISOOffset(match, cursor) {
+  const local = !match[cursor] && !match[cursor + 1],
+    fullOffset = signedOffset(match[cursor + 1], match[cursor + 2]),
+    zone = local ? null : FixedOffsetZone.instance(fullOffset);
+  return [{}, zone, cursor + 3];
+}
+
+function extractIANAZone(match, cursor) {
+  const zone = match[cursor] ? IANAZone.create(match[cursor]) : null;
+  return [{}, zone, cursor + 1];
+}
+
+// ISO duration parsing
+
+const isoDuration = /^P(?:(?:(-?\d{1,9})Y)?(?:(-?\d{1,9})M)?(?:(-?\d{1,9})W)?(?:(-?\d{1,9})D)?(?:T(?:(-?\d{1,9})H)?(?:(-?\d{1,9})M)?(?:(-?\d{1,9})(?:[.,](-?\d{1,9}))?S)?)?)$/;
+
+function extractISODuration(match) {
+  const [
+    ,
+    yearStr,
+    monthStr,
+    weekStr,
+    dayStr,
+    hourStr,
+    minuteStr,
+    secondStr,
+    millisecondsStr
+  ] = match;
+
+  return [
+    {
+      years: parseInteger(yearStr),
+      months: parseInteger(monthStr),
+      weeks: parseInteger(weekStr),
+      days: parseInteger(dayStr),
+      hours: parseInteger(hourStr),
+      minutes: parseInteger(minuteStr),
+      seconds: parseInteger(secondStr),
+      milliseconds: parseMillis(millisecondsStr)
+    }
+  ];
+}
+
+// These are a little braindead. EDT *should* tell us that we're in, say, America/New_York
+// and not just that we're in -240 *right now*. But since I don't think these are used that often
+// I'm just going to ignore that
+const obsOffsets = {
+  GMT: 0,
+  EDT: -4 * 60,
+  EST: -5 * 60,
+  CDT: -5 * 60,
+  CST: -6 * 60,
+  MDT: -6 * 60,
+  MST: -7 * 60,
+  PDT: -7 * 60,
+  PST: -8 * 60
+};
+
+function fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr) {
+  const result = {
+    year: yearStr.length === 2 ? untruncateYear(parseInteger(yearStr)) : parseInteger(yearStr),
+    month: English.monthsShort.indexOf(monthStr) + 1,
+    day: parseInteger(dayStr),
+    hour: parseInteger(hourStr),
+    minute: parseInteger(minuteStr)
+  };
+
+  if (secondStr) result.second = parseInteger(secondStr);
+  if (weekdayStr) {
+    result.weekday =
+      weekdayStr.length > 3
+        ? English.weekdaysLong.indexOf(weekdayStr) + 1
+        : English.weekdaysShort.indexOf(weekdayStr) + 1;
+  }
+
+  return result;
+}
+
+// RFC 2822/5322
+const rfc2822 = /^(?:(Mon|Tue|Wed|Thu|Fri|Sat|Sun),\s)?(\d{1,2})\s(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s(\d{2,4})\s(\d\d):(\d\d)(?::(\d\d))?\s(?:(UT|GMT|[ECMP][SD]T)|([Zz])|(?:([+-]\d\d)(\d\d)))$/;
+
+function extractRFC2822(match) {
+  const [
+      ,
+      weekdayStr,
+      dayStr,
+      monthStr,
+      yearStr,
+      hourStr,
+      minuteStr,
+      secondStr,
+      obsOffset,
+      milOffset,
+      offHourStr,
+      offMinuteStr
+    ] = match,
+    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);
+
+  let offset;
+  if (obsOffset) {
+    offset = obsOffsets[obsOffset];
+  } else if (milOffset) {
+    offset = 0;
+  } else {
+    offset = signedOffset(offHourStr, offMinuteStr);
+  }
+
+  return [result, new FixedOffsetZone(offset)];
+}
+
+function preprocessRFC2822(s) {
+  // Remove comments and folding whitespace and replace multiple-spaces with a single space
+  return s
+    .replace(/\([^)]*\)|[\n\t]/g, " ")
+    .replace(/(\s\s+)/g, " ")
+    .trim();
+}
+
+// http date
+
+const rfc1123 = /^(Mon|Tue|Wed|Thu|Fri|Sat|Sun), (\d\d) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) (\d{4}) (\d\d):(\d\d):(\d\d) GMT$/,
+  rfc850 = /^(Monday|Tuesday|Wedsday|Thursday|Friday|Saturday|Sunday), (\d\d)-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-(\d\d) (\d\d):(\d\d):(\d\d) GMT$/,
+  ascii = /^(Mon|Tue|Wed|Thu|Fri|Sat|Sun) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) ( \d|\d\d) (\d\d):(\d\d):(\d\d) (\d{4})$/;
+
+function extractRFC1123Or850(match) {
+  const [, weekdayStr, dayStr, monthStr, yearStr, hourStr, minuteStr, secondStr] = match,
+    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);
+  return [result, FixedOffsetZone.utcInstance];
+}
+
+function extractASCII(match) {
+  const [, weekdayStr, monthStr, dayStr, hourStr, minuteStr, secondStr, yearStr] = match,
+    result = fromStrings(weekdayStr, yearStr, monthStr, dayStr, hourStr, minuteStr, secondStr);
+  return [result, FixedOffsetZone.utcInstance];
+}
+
+const isoYmdWithTimeExtensionRegex = combineRegexes(isoYmdRegex, isoTimeExtensionRegex);
+const isoWeekWithTimeExtensionRegex = combineRegexes(isoWeekRegex, isoTimeExtensionRegex);
+const isoOrdinalWithTimeExtensionRegex = combineRegexes(isoOrdinalRegex, isoTimeExtensionRegex);
+const isoTimeCombinedRegex = combineRegexes(isoTimeRegex);
+
+const extractISOYmdTimeAndOffset = combineExtractors(
+  extractISOYmd,
+  extractISOTime,
+  extractISOOffset
+);
+const extractISOWeekTimeAndOffset = combineExtractors(
+  extractISOWeekData,
+  extractISOTime,
+  extractISOOffset
+);
+const extractISOOrdinalDataAndTime = combineExtractors(extractISOOrdinalData, extractISOTime);
+const extractISOTimeAndOffset = combineExtractors(extractISOTime, extractISOOffset);
+
+/**
+ * @private
+ */
+
+export function parseISODate(s) {
+  return parse(
+    s,
+    [isoYmdWithTimeExtensionRegex, extractISOYmdTimeAndOffset],
+    [isoWeekWithTimeExtensionRegex, extractISOWeekTimeAndOffset],
+    [isoOrdinalWithTimeExtensionRegex, extractISOOrdinalDataAndTime],
+    [isoTimeCombinedRegex, extractISOTimeAndOffset]
+  );
+}
+
+export function parseRFC2822Date(s) {
+  return parse(preprocessRFC2822(s), [rfc2822, extractRFC2822]);
+}
+
+export function parseHTTPDate(s) {
+  return parse(
+    s,
+    [rfc1123, extractRFC1123Or850],
+    [rfc850, extractRFC1123Or850],
+    [ascii, extractASCII]
+  );
+}
+
+export function parseISODuration(s) {
+  return parse(s, [isoDuration, extractISODuration]);
+}
+
+const sqlYmdWithTimeExtensionRegex = combineRegexes(sqlYmdRegex, sqlTimeExtensionRegex);
+const sqlTimeCombinedRegex = combineRegexes(sqlTimeRegex);
+
+const extractISOYmdTimeOffsetAndIANAZone = combineExtractors(
+  extractISOYmd,
+  extractISOTime,
+  extractISOOffset,
+  extractIANAZone
+);
+const extractISOTimeOffsetAndIANAZone = combineExtractors(
+  extractISOTime,
+  extractISOOffset,
+  extractIANAZone
+);
+
+export function parseSQL(s) {
+  return parse(
+    s,
+    [sqlYmdWithTimeExtensionRegex, extractISOYmdTimeOffsetAndIANAZone],
+    [sqlTimeCombinedRegex, extractISOTimeOffsetAndIANAZone]
+  );
+}

node_modules/luxon/src/impl/tokenParser.js

@@ -0,0 +1,410 @@
+import { parseMillis, isUndefined, untruncateYear, signedOffset, hasOwnProperty } from "./util.js";
+import Formatter from "./formatter.js";
+import FixedOffsetZone from "../zones/fixedOffsetZone.js";
+import IANAZone from "../zones/IANAZone.js";
+import DateTime from "../datetime.js";
+import { digitRegex, parseDigits } from "./digits.js";
+
+const MISSING_FTP = "missing Intl.DateTimeFormat.formatToParts support";
+
+function intUnit(regex, post = i => i) {
+  return { regex, deser: ([s]) => post(parseDigits(s)) };
+}
+
+function fixListRegex(s) {
+  // make dots optional and also make them literal
+  return s.replace(/\./, "\\.?");
+}
+
+function stripInsensitivities(s) {
+  return s.replace(/\./, "").toLowerCase();
+}
+
+function oneOf(strings, startIndex) {
+  if (strings === null) {
+    return null;
+  } else {
+    return {
+      regex: RegExp(strings.map(fixListRegex).join("|")),
+      deser: ([s]) =>
+        strings.findIndex(i => stripInsensitivities(s) === stripInsensitivities(i)) + startIndex
+    };
+  }
+}
+
+function offset(regex, groups) {
+  return { regex, deser: ([, h, m]) => signedOffset(h, m), groups };
+}
+
+function simple(regex) {
+  return { regex, deser: ([s]) => s };
+}
+
+function escapeToken(value) {
+  // eslint-disable-next-line no-useless-escape
+  return value.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
+}
+
+function unitForToken(token, loc) {
+  const one = digitRegex(loc),
+    two = digitRegex(loc, "{2}"),
+    three = digitRegex(loc, "{3}"),
+    four = digitRegex(loc, "{4}"),
+    six = digitRegex(loc, "{6}"),
+    oneOrTwo = digitRegex(loc, "{1,2}"),
+    oneToThree = digitRegex(loc, "{1,3}"),
+    oneToSix = digitRegex(loc, "{1,6}"),
+    oneToNine = digitRegex(loc, "{1,9}"),
+    twoToFour = digitRegex(loc, "{2,4}"),
+    fourToSix = digitRegex(loc, "{4,6}"),
+    literal = t => ({ regex: RegExp(escapeToken(t.val)), deser: ([s]) => s, literal: true }),
+    unitate = t => {
+      if (token.literal) {
+        return literal(t);
+      }
+      switch (t.val) {
+        // era
+        case "G":
+          return oneOf(loc.eras("short", false), 0);
+        case "GG":
+          return oneOf(loc.eras("long", false), 0);
+        // years
+        case "y":
+          return intUnit(oneToSix);
+        case "yy":
+          return intUnit(twoToFour, untruncateYear);
+        case "yyyy":
+          return intUnit(four);
+        case "yyyyy":
+          return intUnit(fourToSix);
+        case "yyyyyy":
+          return intUnit(six);
+        // months
+        case "M":
+          return intUnit(oneOrTwo);
+        case "MM":
+          return intUnit(two);
+        case "MMM":
+          return oneOf(loc.months("short", true, false), 1);
+        case "MMMM":
+          return oneOf(loc.months("long", true, false), 1);
+        case "L":
+          return intUnit(oneOrTwo);
+        case "LL":
+          return intUnit(two);
+        case "LLL":
+          return oneOf(loc.months("short", false, false), 1);
+        case "LLLL":
+          return oneOf(loc.months("long", false, false), 1);
+        // dates
+        case "d":
+          return intUnit(oneOrTwo);
+        case "dd":
+          return intUnit(two);
+        // ordinals
+        case "o":
+          return intUnit(oneToThree);
+        case "ooo":
+          return intUnit(three);
+        // time
+        case "HH":
+          return intUnit(two);
+        case "H":
+          return intUnit(oneOrTwo);
+        case "hh":
+          return intUnit(two);
+        case "h":
+          return intUnit(oneOrTwo);
+        case "mm":
+          return intUnit(two);
+        case "m":
+          return intUnit(oneOrTwo);
+        case "q":
+          return intUnit(oneOrTwo);
+        case "qq":
+          return intUnit(two);
+        case "s":
+          return intUnit(oneOrTwo);
+        case "ss":
+          return intUnit(two);
+        case "S":
+          return intUnit(oneToThree);
+        case "SSS":
+          return intUnit(three);
+        case "u":
+          return simple(oneToNine);
+        // meridiem
+        case "a":
+          return oneOf(loc.meridiems(), 0);
+        // weekYear (k)
+        case "kkkk":
+          return intUnit(four);
+        case "kk":
+          return intUnit(twoToFour, untruncateYear);
+        // weekNumber (W)
+        case "W":
+          return intUnit(oneOrTwo);
+        case "WW":
+          return intUnit(two);
+        // weekdays
+        case "E":
+        case "c":
+          return intUnit(one);
+        case "EEE":
+          return oneOf(loc.weekdays("short", false, false), 1);
+        case "EEEE":
+          return oneOf(loc.weekdays("long", false, false), 1);
+        case "ccc":
+          return oneOf(loc.weekdays("short", true, false), 1);
+        case "cccc":
+          return oneOf(loc.weekdays("long", true, false), 1);
+        // offset/zone
+        case "Z":
+        case "ZZ":
+          return offset(new RegExp(`([+-]${oneOrTwo.source})(?::(${two.source}))?`), 2);
+        case "ZZZ":
+          return offset(new RegExp(`([+-]${oneOrTwo.source})(${two.source})?`), 2);
+        // we don't support ZZZZ (PST) or ZZZZZ (Pacific Standard Time) in parsing
+        // because we don't have any way to figure out what they are
+        case "z":
+          return simple(/[a-z_+-/]{1,256}?/i);
+        default:
+          return literal(t);
+      }
+    };
+
+  const unit = unitate(token) || {
+    invalidReason: MISSING_FTP
+  };
+
+  unit.token = token;
+
+  return unit;
+}
+
+const partTypeStyleToTokenVal = {
+  year: {
+    "2-digit": "yy",
+    numeric: "yyyyy"
+  },
+  month: {
+    numeric: "M",
+    "2-digit": "MM",
+    short: "MMM",
+    long: "MMMM"
+  },
+  day: {
+    numeric: "d",
+    "2-digit": "dd"
+  },
+  weekday: {
+    short: "EEE",
+    long: "EEEE"
+  },
+  dayperiod: "a",
+  hour: {
+    numeric: "h",
+    "2-digit": "hh"
+  },
+  minute: {
+    numeric: "m",
+    "2-digit": "mm"
+  },
+  second: {
+    numeric: "s",
+    "2-digit": "ss"
+  }
+};
+
+function tokenForPart(part, locale, formatOpts) {
+  const { type, value } = part;
+
+  if (type === "literal") {
+    return {
+      literal: true,
+      val: value
+    };
+  }
+
+  const style = formatOpts[type];
+
+  let val = partTypeStyleToTokenVal[type];
+  if (typeof val === "object") {
+    val = val[style];
+  }
+
+  if (val) {
+    return {
+      literal: false,
+      val
+    };
+  }
+
+  return undefined;
+}
+
+function buildRegex(units) {
+  const re = units.map(u => u.regex).reduce((f, r) => `${f}(${r.source})`, "");
+  return [`^${re}$`, units];
+}
+
+function match(input, regex, handlers) {
+  const matches = input.match(regex);
+
+  if (matches) {
+    const all = {};
+    let matchIndex = 1;
+    for (const i in handlers) {
+      if (hasOwnProperty(handlers, i)) {
+        const h = handlers[i],
+          groups = h.groups ? h.groups + 1 : 1;
+        if (!h.literal && h.token) {
+          all[h.token.val[0]] = h.deser(matches.slice(matchIndex, matchIndex + groups));
+        }
+        matchIndex += groups;
+      }
+    }
+    return [matches, all];
+  } else {
+    return [matches, {}];
+  }
+}
+
+function dateTimeFromMatches(matches) {
+  const toField = token => {
+    switch (token) {
+      case "S":
+        return "millisecond";
+      case "s":
+        return "second";
+      case "m":
+        return "minute";
+      case "h":
+      case "H":
+        return "hour";
+      case "d":
+        return "day";
+      case "o":
+        return "ordinal";
+      case "L":
+      case "M":
+        return "month";
+      case "y":
+        return "year";
+      case "E":
+      case "c":
+        return "weekday";
+      case "W":
+        return "weekNumber";
+      case "k":
+        return "weekYear";
+      case "q":
+        return "quarter";
+      default:
+        return null;
+    }
+  };
+
+  let zone;
+  if (!isUndefined(matches.Z)) {
+    zone = new FixedOffsetZone(matches.Z);
+  } else if (!isUndefined(matches.z)) {
+    zone = IANAZone.create(matches.z);
+  } else {
+    zone = null;
+  }
+
+  if (!isUndefined(matches.q)) {
+    matches.M = (matches.q - 1) * 3 + 1;
+  }
+
+  if (!isUndefined(matches.h)) {
+    if (matches.h < 12 && matches.a === 1) {
+      matches.h += 12;
+    } else if (matches.h === 12 && matches.a === 0) {
+      matches.h = 0;
+    }
+  }
+
+  if (matches.G === 0 && matches.y) {
+    matches.y = -matches.y;
+  }
+
+  if (!isUndefined(matches.u)) {
+    matches.S = parseMillis(matches.u);
+  }
+
+  const vals = Object.keys(matches).reduce((r, k) => {
+    const f = toField(k);
+    if (f) {
+      r[f] = matches[k];
+    }
+
+    return r;
+  }, {});
+
+  return [vals, zone];
+}
+
+let dummyDateTimeCache = null;
+
+function getDummyDateTime() {
+  if (!dummyDateTimeCache) {
+    dummyDateTimeCache = DateTime.fromMillis(1555555555555);
+  }
+
+  return dummyDateTimeCache;
+}
+
+function maybeExpandMacroToken(token, locale) {
+  if (token.literal) {
+    return token;
+  }
+
+  const formatOpts = Formatter.macroTokenToFormatOpts(token.val);
+
+  if (!formatOpts) {
+    return token;
+  }
+
+  const formatter = Formatter.create(locale, formatOpts);
+  const parts = formatter.formatDateTimeParts(getDummyDateTime());
+
+  const tokens = parts.map(p => tokenForPart(p, locale, formatOpts));
+
+  if (tokens.includes(undefined)) {
+    return token;
+  }
+
+  return tokens;
+}
+
+function expandMacroTokens(tokens, locale) {
+  return Array.prototype.concat(...tokens.map(t => maybeExpandMacroToken(t, locale)));
+}
+
+/**
+ * @private
+ */
+
+export function explainFromTokens(locale, input, format) {
+  const tokens = expandMacroTokens(Formatter.parseFormat(format), locale),
+    units = tokens.map(t => unitForToken(t, locale)),
+    disqualifyingUnit = units.find(t => t.invalidReason);
+
+  if (disqualifyingUnit) {
+    return { input, tokens, invalidReason: disqualifyingUnit.invalidReason };
+  } else {
+    const [regexString, handlers] = buildRegex(units),
+      regex = RegExp(regexString, "i"),
+      [rawMatches, matches] = match(input, regex, handlers),
+      [result, zone] = matches ? dateTimeFromMatches(matches) : [null, null];
+
+    return { input, tokens, regex, rawMatches, matches, result, zone };
+  }
+}
+
+export function parseFromTokens(locale, input, format) {
+  const { result, zone, invalidReason } = explainFromTokens(locale, input, format);
+  return [result, zone, invalidReason];
+}

node_modules/luxon/src/impl/util.js

@@ -0,0 +1,287 @@
+/*
+  This is just a junk drawer, containing anything used across multiple classes.
+  Because Luxon is small(ish), this should stay small and we won't worry about splitting
+  it up into, say, parsingUtil.js and basicUtil.js and so on. But they are divided up by feature area.
+*/
+
+import { InvalidArgumentError } from "../errors.js";
+
+/**
+ * @private
+ */
+
+// TYPES
+
+export function isUndefined(o) {
+  return typeof o === "undefined";
+}
+
+export function isNumber(o) {
+  return typeof o === "number";
+}
+
+export function isInteger(o) {
+  return typeof o === "number" && o % 1 === 0;
+}
+
+export function isString(o) {
+  return typeof o === "string";
+}
+
+export function isDate(o) {
+  return Object.prototype.toString.call(o) === "[object Date]";
+}
+
+// CAPABILITIES
+
+export function hasIntl() {
+  try {
+    return typeof Intl !== "undefined" && Intl.DateTimeFormat;
+  } catch (e) {
+    return false;
+  }
+}
+
+export function hasFormatToParts() {
+  return !isUndefined(Intl.DateTimeFormat.prototype.formatToParts);
+}
+
+export function hasRelative() {
+  try {
+    return typeof Intl !== "undefined" && !!Intl.RelativeTimeFormat;
+  } catch (e) {
+    return false;
+  }
+}
+
+// OBJECTS AND ARRAYS
+
+export function maybeArray(thing) {
+  return Array.isArray(thing) ? thing : [thing];
+}
+
+export function bestBy(arr, by, compare) {
+  if (arr.length === 0) {
+    return undefined;
+  }
+  return arr.reduce((best, next) => {
+    const pair = [by(next), next];
+    if (!best) {
+      return pair;
+    } else if (compare(best[0], pair[0]) === best[0]) {
+      return best;
+    } else {
+      return pair;
+    }
+  }, null)[1];
+}
+
+export function pick(obj, keys) {
+  return keys.reduce((a, k) => {
+    a[k] = obj[k];
+    return a;
+  }, {});
+}
+
+export function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+// NUMBERS AND STRINGS
+
+export function integerBetween(thing, bottom, top) {
+  return isInteger(thing) && thing >= bottom && thing <= top;
+}
+
+// x % n but takes the sign of n instead of x
+export function floorMod(x, n) {
+  return x - n * Math.floor(x / n);
+}
+
+export function padStart(input, n = 2) {
+  if (input.toString().length < n) {
+    return ("0".repeat(n) + input).slice(-n);
+  } else {
+    return input.toString();
+  }
+}
+
+export function parseInteger(string) {
+  if (isUndefined(string) || string === null || string === "") {
+    return undefined;
+  } else {
+    return parseInt(string, 10);
+  }
+}
+
+export function parseMillis(fraction) {
+  // Return undefined (instead of 0) in these cases, where fraction is not set
+  if (isUndefined(fraction) || fraction === null || fraction === "") {
+    return undefined;
+  } else {
+    const f = parseFloat("0." + fraction) * 1000;
+    return Math.floor(f);
+  }
+}
+
+export function roundTo(number, digits, towardZero = false) {
+  const factor = 10 ** digits,
+    rounder = towardZero ? Math.trunc : Math.round;
+  return rounder(number * factor) / factor;
+}
+
+// DATE BASICS
+
+export function isLeapYear(year) {
+  return year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0);
+}
+
+export function daysInYear(year) {
+  return isLeapYear(year) ? 366 : 365;
+}
+
+export function daysInMonth(year, month) {
+  const modMonth = floorMod(month - 1, 12) + 1,
+    modYear = year + (month - modMonth) / 12;
+
+  if (modMonth === 2) {
+    return isLeapYear(modYear) ? 29 : 28;
+  } else {
+    return [31, null, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][modMonth - 1];
+  }
+}
+
+// covert a calendar object to a local timestamp (epoch, but with the offset baked in)
+export function objToLocalTS(obj) {
+  let d = Date.UTC(
+    obj.year,
+    obj.month - 1,
+    obj.day,
+    obj.hour,
+    obj.minute,
+    obj.second,
+    obj.millisecond
+  );
+
+  // for legacy reasons, years between 0 and 99 are interpreted as 19XX; revert that
+  if (obj.year < 100 && obj.year >= 0) {
+    d = new Date(d);
+    d.setUTCFullYear(d.getUTCFullYear() - 1900);
+  }
+  return +d;
+}
+
+export function weeksInWeekYear(weekYear) {
+  const p1 =
+      (weekYear +
+        Math.floor(weekYear / 4) -
+        Math.floor(weekYear / 100) +
+        Math.floor(weekYear / 400)) %
+      7,
+    last = weekYear - 1,
+    p2 = (last + Math.floor(last / 4) - Math.floor(last / 100) + Math.floor(last / 400)) % 7;
+  return p1 === 4 || p2 === 3 ? 53 : 52;
+}
+
+export function untruncateYear(year) {
+  if (year > 99) {
+    return year;
+  } else return year > 60 ? 1900 + year : 2000 + year;
+}
+
+// PARSING
+
+export function parseZoneInfo(ts, offsetFormat, locale, timeZone = null) {
+  const date = new Date(ts),
+    intlOpts = {
+      hour12: false,
+      year: "numeric",
+      month: "2-digit",
+      day: "2-digit",
+      hour: "2-digit",
+      minute: "2-digit"
+    };
+
+  if (timeZone) {
+    intlOpts.timeZone = timeZone;
+  }
+
+  const modified = Object.assign({ timeZoneName: offsetFormat }, intlOpts),
+    intl = hasIntl();
+
+  if (intl && hasFormatToParts()) {
+    const parsed = new Intl.DateTimeFormat(locale, modified)
+      .formatToParts(date)
+      .find(m => m.type.toLowerCase() === "timezonename");
+    return parsed ? parsed.value : null;
+  } else if (intl) {
+    // this probably doesn't work for all locales
+    const without = new Intl.DateTimeFormat(locale, intlOpts).format(date),
+      included = new Intl.DateTimeFormat(locale, modified).format(date),
+      diffed = included.substring(without.length),
+      trimmed = diffed.replace(/^[, \u200e]+/, "");
+    return trimmed;
+  } else {
+    return null;
+  }
+}
+
+// signedOffset('-5', '30') -> -330
+export function signedOffset(offHourStr, offMinuteStr) {
+  let offHour = parseInt(offHourStr, 10);
+
+  // don't || this because we want to preserve -0
+  if (Number.isNaN(offHour)) {
+    offHour = 0;
+  }
+
+  const offMin = parseInt(offMinuteStr, 10) || 0,
+    offMinSigned = offHour < 0 || Object.is(offHour, -0) ? -offMin : offMin;
+  return offHour * 60 + offMinSigned;
+}
+
+// COERCION
+
+export function asNumber(value) {
+  const numericValue = Number(value);
+  if (typeof value === "boolean" || value === "" || Number.isNaN(numericValue))
+    throw new InvalidArgumentError(`Invalid unit value ${value}`);
+  return numericValue;
+}
+
+export function normalizeObject(obj, normalizer, nonUnitKeys) {
+  const normalized = {};
+  for (const u in obj) {
+    if (hasOwnProperty(obj, u)) {
+      if (nonUnitKeys.indexOf(u) >= 0) continue;
+      const v = obj[u];
+      if (v === undefined || v === null) continue;
+      normalized[normalizer(u)] = asNumber(v);
+    }
+  }
+  return normalized;
+}
+
+export function formatOffset(offset, format) {
+  const hours = Math.trunc(offset / 60),
+    minutes = Math.abs(offset % 60),
+    sign = hours >= 0 && !Object.is(hours, -0) ? "+" : "-",
+    base = `${sign}${Math.abs(hours)}`;
+
+  switch (format) {
+    case "short":
+      return `${sign}${padStart(Math.abs(hours), 2)}:${padStart(minutes, 2)}`;
+    case "narrow":
+      return minutes > 0 ? `${base}:${minutes}` : base;
+    case "techie":
+      return `${sign}${padStart(Math.abs(hours), 2)}${padStart(minutes, 2)}`;
+    default:
+      throw new RangeError(`Value format ${format} is out of range for property format`);
+  }
+}
+
+export function timeObject(obj) {
+  return pick(obj, ["hour", "minute", "second", "millisecond"]);
+}
+
+export const ianaRegex = /[A-Za-z_+-]{1,256}(:?\/[A-Za-z_+-]{1,256}(\/[A-Za-z_+-]{1,256})?)?/;

node_modules/luxon/src/impl/zoneUtil.js

@@ -0,0 +1,36 @@
+/**
+ * @private
+ */
+
+import Zone from "../zone.js";
+import IANAZone from "../zones/IANAZone.js";
+import FixedOffsetZone from "../zones/fixedOffsetZone.js";
+import InvalidZone from "../zones/invalidZone.js";
+
+import { isUndefined, isString, isNumber } from "./util.js";
+
+export function normalizeZone(input, defaultZone) {
+  let offset;
+  if (isUndefined(input) || input === null) {
+    return defaultZone;
+  } else if (input instanceof Zone) {
+    return input;
+  } else if (isString(input)) {
+    const lowered = input.toLowerCase();
+    if (lowered === "local") return defaultZone;
+    else if (lowered === "utc" || lowered === "gmt") return FixedOffsetZone.utcInstance;
+    else if ((offset = IANAZone.parseGMTOffset(input)) != null) {
+      // handle Etc/GMT-4, which V8 chokes on
+      return FixedOffsetZone.instance(offset);
+    } else if (IANAZone.isValidSpecifier(lowered)) return IANAZone.create(input);
+    else return FixedOffsetZone.parseSpecifier(lowered) || new InvalidZone(input);
+  } else if (isNumber(input)) {
+    return FixedOffsetZone.instance(input);
+  } else if (typeof input === "object" && input.offset && typeof input.offset === "number") {
+    // This is dumb, but the instanceof check above doesn't seem to really work
+    // so we're duck checking it
+    return input;
+  } else {
+    return new InvalidZone(input);
+  }
+}

node_modules/luxon/src/info.js

@@ -0,0 +1,186 @@
+import DateTime from "./datetime.js";
+import Settings from "./settings.js";
+import Locale from "./impl/locale.js";
+import IANAZone from "./zones/IANAZone.js";
+import { normalizeZone } from "./impl/zoneUtil.js";
+
+import { hasFormatToParts, hasIntl, hasRelative } from "./impl/util.js";
+
+/**
+ * The Info class contains static methods for retrieving general time and date related data. For example, it has methods for finding out if a time zone has a DST, for listing the months in any supported locale, and for discovering which of Luxon features are available in the current environment.
+ */
+export default class Info {
+  /**
+   * Return whether the specified zone contains a DST.
+   * @param {string|Zone} [zone='local'] - Zone to check. Defaults to the environment's local zone.
+   * @return {boolean}
+   */
+  static hasDST(zone = Settings.defaultZone) {
+    const proto = DateTime.local()
+      .setZone(zone)
+      .set({ month: 12 });
+
+    return !zone.universal && proto.offset !== proto.set({ month: 6 }).offset;
+  }
+
+  /**
+   * Return whether the specified zone is a valid IANA specifier.
+   * @param {string} zone - Zone to check
+   * @return {boolean}
+   */
+  static isValidIANAZone(zone) {
+    return IANAZone.isValidSpecifier(zone) && IANAZone.isValidZone(zone);
+  }
+
+  /**
+   * Converts the input into a {@link Zone} instance.
+   *
+   * * If `input` is already a Zone instance, it is returned unchanged.
+   * * If `input` is a string containing a valid time zone name, a Zone instance
+   *   with that name is returned.
+   * * If `input` is a string that doesn't refer to a known time zone, a Zone
+   *   instance with {@link Zone.isValid} == false is returned.
+   * * If `input is a number, a Zone instance with the specified fixed offset
+   *   in minutes is returned.
+   * * If `input` is `null` or `undefined`, the default zone is returned.
+   * @param {string|Zone|number} [input] - the value to be converted
+   * @return {Zone}
+   */
+  static normalizeZone(input) {
+    return normalizeZone(input, Settings.defaultZone);
+  }
+
+  /**
+   * Return an array of standalone month names.
+   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat
+   * @param {string} [length='long'] - the length of the month representation, such as "numeric", "2-digit", "narrow", "short", "long"
+   * @param {Object} opts - options
+   * @param {string} [opts.locale] - the locale code
+   * @param {string} [opts.numberingSystem=null] - the numbering system
+   * @param {string} [opts.outputCalendar='gregory'] - the calendar
+   * @example Info.months()[0] //=> 'January'
+   * @example Info.months('short')[0] //=> 'Jan'
+   * @example Info.months('numeric')[0] //=> '1'
+   * @example Info.months('short', { locale: 'fr-CA' } )[0] //=> 'janv.'
+   * @example Info.months('numeric', { locale: 'ar' })[0] //=> '١'
+   * @example Info.months('long', { outputCalendar: 'islamic' })[0] //=> 'Rabiʻ I'
+   * @return {[string]}
+   */
+  static months(
+    length = "long",
+    { locale = null, numberingSystem = null, outputCalendar = "gregory" } = {}
+  ) {
+    return Locale.create(locale, numberingSystem, outputCalendar).months(length);
+  }
+
+  /**
+   * Return an array of format month names.
+   * Format months differ from standalone months in that they're meant to appear next to the day of the month. In some languages, that
+   * changes the string.
+   * See {@link months}
+   * @param {string} [length='long'] - the length of the month representation, such as "numeric", "2-digit", "narrow", "short", "long"
+   * @param {Object} opts - options
+   * @param {string} [opts.locale] - the locale code
+   * @param {string} [opts.numberingSystem=null] - the numbering system
+   * @param {string} [opts.outputCalendar='gregory'] - the calendar
+   * @return {[string]}
+   */
+  static monthsFormat(
+    length = "long",
+    { locale = null, numberingSystem = null, outputCalendar = "gregory" } = {}
+  ) {
+    return Locale.create(locale, numberingSystem, outputCalendar).months(length, true);
+  }
+
+  /**
+   * Return an array of standalone week names.
+   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat
+   * @param {string} [length='long'] - the length of the month representation, such as "narrow", "short", "long".
+   * @param {Object} opts - options
+   * @param {string} [opts.locale] - the locale code
+   * @param {string} [opts.numberingSystem=null] - the numbering system
+   * @example Info.weekdays()[0] //=> 'Monday'
+   * @example Info.weekdays('short')[0] //=> 'Mon'
+   * @example Info.weekdays('short', { locale: 'fr-CA' })[0] //=> 'lun.'
+   * @example Info.weekdays('short', { locale: 'ar' })[0] //=> 'الاثنين'
+   * @return {[string]}
+   */
+  static weekdays(length = "long", { locale = null, numberingSystem = null } = {}) {
+    return Locale.create(locale, numberingSystem, null).weekdays(length);
+  }
+
+  /**
+   * Return an array of format week names.
+   * Format weekdays differ from standalone weekdays in that they're meant to appear next to more date information. In some languages, that
+   * changes the string.
+   * See {@link weekdays}
+   * @param {string} [length='long'] - the length of the month representation, such as "narrow", "short", "long".
+   * @param {Object} opts - options
+   * @param {string} [opts.locale=null] - the locale code
+   * @param {string} [opts.numberingSystem=null] - the numbering system
+   * @return {[string]}
+   */
+  static weekdaysFormat(length = "long", { locale = null, numberingSystem = null } = {}) {
+    return Locale.create(locale, numberingSystem, null).weekdays(length, true);
+  }
+
+  /**
+   * Return an array of meridiems.
+   * @param {Object} opts - options
+   * @param {string} [opts.locale] - the locale code
+   * @example Info.meridiems() //=> [ 'AM', 'PM' ]
+   * @example Info.meridiems({ locale: 'my' }) //=> [ 'နံနက်', 'ညနေ' ]
+   * @return {[string]}
+   */
+  static meridiems({ locale = null } = {}) {
+    return Locale.create(locale).meridiems();
+  }
+
+  /**
+   * Return an array of eras, such as ['BC', 'AD']. The locale can be specified, but the calendar system is always Gregorian.
+   * @param {string} [length='short'] - the length of the era representation, such as "short" or "long".
+   * @param {Object} opts - options
+   * @param {string} [opts.locale] - the locale code
+   * @example Info.eras() //=> [ 'BC', 'AD' ]
+   * @example Info.eras('long') //=> [ 'Before Christ', 'Anno Domini' ]
+   * @example Info.eras('long', { locale: 'fr' }) //=> [ 'avant Jésus-Christ', 'après Jésus-Christ' ]
+   * @return {[string]}
+   */
+  static eras(length = "short", { locale = null } = {}) {
+    return Locale.create(locale, null, "gregory").eras(length);
+  }
+
+  /**
+   * Return the set of available features in this environment.
+   * Some features of Luxon are not available in all environments. For example, on older browsers, timezone support is not available. Use this function to figure out if that's the case.
+   * Keys:
+   * * `zones`: whether this environment supports IANA timezones
+   * * `intlTokens`: whether this environment supports internationalized token-based formatting/parsing
+   * * `intl`: whether this environment supports general internationalization
+   * * `relative`: whether this environment supports relative time formatting
+   * @example Info.features() //=> { intl: true, intlTokens: false, zones: true, relative: false }
+   * @return {Object}
+   */
+  static features() {
+    let intl = false,
+      intlTokens = false,
+      zones = false,
+      relative = false;
+
+    if (hasIntl()) {
+      intl = true;
+      intlTokens = hasFormatToParts();
+      relative = hasRelative();
+
+      try {
+        zones =
+          new Intl.DateTimeFormat("en", { timeZone: "America/New_York" }).resolvedOptions()
+            .timeZone === "America/New_York";
+      } catch (e) {
+        zones = false;
+      }
+    }
+
+    return { intl, intlTokens, zones, relative };
+  }
+}

node_modules/luxon/src/interval.js

@@ -0,0 +1,588 @@
+import DateTime, { friendlyDateTime } from "./datetime.js";
+import Duration, { friendlyDuration } from "./duration.js";
+import Settings from "./settings.js";
+import { InvalidArgumentError, InvalidIntervalError } from "./errors.js";
+import Invalid from "./impl/invalid.js";
+
+const INVALID = "Invalid Interval";
+
+// checks if the start is equal to or before the end
+function validateStartEnd(start, end) {
+  if (!start || !start.isValid) {
+    return Interval.invalid("missing or invalid start");
+  } else if (!end || !end.isValid) {
+    return Interval.invalid("missing or invalid end");
+  } else if (end < start) {
+    return Interval.invalid(
+      "end before start",
+      `The end of an interval must be after its start, but you had start=${start.toISO()} and end=${end.toISO()}`
+    );
+  } else {
+    return null;
+  }
+}
+
+/**
+ * An Interval object represents a half-open interval of time, where each endpoint is a {@link DateTime}. Conceptually, it's a container for those two endpoints, accompanied by methods for creating, parsing, interrogating, comparing, transforming, and formatting them.
+ *
+ * Here is a brief overview of the most commonly used methods and getters in Interval:
+ *
+ * * **Creation** To create an Interval, use {@link fromDateTimes}, {@link after}, {@link before}, or {@link fromISO}.
+ * * **Accessors** Use {@link start} and {@link end} to get the start and end.
+ * * **Interrogation** To analyze the Interval, use {@link count}, {@link length}, {@link hasSame}, {@link contains}, {@link isAfter}, or {@link isBefore}.
+ * * **Transformation** To create other Intervals out of this one, use {@link set}, {@link splitAt}, {@link splitBy}, {@link divideEqually}, {@link merge}, {@link xor}, {@link union}, {@link intersection}, or {@link difference}.
+ * * **Comparison** To compare this Interval to another one, use {@link equals}, {@link overlaps}, {@link abutsStart}, {@link abutsEnd}, {@link engulfs}
+ * * **Output** To convert the Interval into other representations, see {@link toString}, {@link toISO}, {@link toISODate}, {@link toISOTime}, {@link toFormat}, and {@link toDuration}.
+ */
+export default class Interval {
+  /**
+   * @private
+   */
+  constructor(config) {
+    /**
+     * @access private
+     */
+    this.s = config.start;
+    /**
+     * @access private
+     */
+    this.e = config.end;
+    /**
+     * @access private
+     */
+    this.invalid = config.invalid || null;
+    /**
+     * @access private
+     */
+    this.isLuxonInterval = true;
+  }
+
+  /**
+   * Create an invalid Interval.
+   * @param {string} reason - simple string of why this Interval is invalid. Should not contain parameters or anything else data-dependent
+   * @param {string} [explanation=null] - longer explanation, may include parameters and other useful debugging information
+   * @return {Interval}
+   */
+  static invalid(reason, explanation = null) {
+    if (!reason) {
+      throw new InvalidArgumentError("need to specify a reason the Interval is invalid");
+    }
+
+    const invalid = reason instanceof Invalid ? reason : new Invalid(reason, explanation);
+
+    if (Settings.throwOnInvalid) {
+      throw new InvalidIntervalError(invalid);
+    } else {
+      return new Interval({ invalid });
+    }
+  }
+
+  /**
+   * Create an Interval from a start DateTime and an end DateTime. Inclusive of the start but not the end.
+   * @param {DateTime|Date|Object} start
+   * @param {DateTime|Date|Object} end
+   * @return {Interval}
+   */
+  static fromDateTimes(start, end) {
+    const builtStart = friendlyDateTime(start),
+      builtEnd = friendlyDateTime(end);
+
+    const validateError = validateStartEnd(builtStart, builtEnd);
+
+    if (validateError == null) {
+      return new Interval({
+        start: builtStart,
+        end: builtEnd
+      });
+    } else {
+      return validateError;
+    }
+  }
+
+  /**
+   * Create an Interval from a start DateTime and a Duration to extend to.
+   * @param {DateTime|Date|Object} start
+   * @param {Duration|Object|number} duration - the length of the Interval.
+   * @return {Interval}
+   */
+  static after(start, duration) {
+    const dur = friendlyDuration(duration),
+      dt = friendlyDateTime(start);
+    return Interval.fromDateTimes(dt, dt.plus(dur));
+  }
+
+  /**
+   * Create an Interval from an end DateTime and a Duration to extend backwards to.
+   * @param {DateTime|Date|Object} end
+   * @param {Duration|Object|number} duration - the length of the Interval.
+   * @return {Interval}
+   */
+  static before(end, duration) {
+    const dur = friendlyDuration(duration),
+      dt = friendlyDateTime(end);
+    return Interval.fromDateTimes(dt.minus(dur), dt);
+  }
+
+  /**
+   * Create an Interval from an ISO 8601 string.
+   * Accepts `<start>/<end>`, `<start>/<duration>`, and `<duration>/<end>` formats.
+   * @param {string} text - the ISO string to parse
+   * @param {Object} [opts] - options to pass {@link DateTime.fromISO} and optionally {@link Duration.fromISO}
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Time_intervals
+   * @return {Interval}
+   */
+  static fromISO(text, opts) {
+    const [s, e] = (text || "").split("/", 2);
+    if (s && e) {
+      const start = DateTime.fromISO(s, opts),
+        end = DateTime.fromISO(e, opts);
+
+      if (start.isValid && end.isValid) {
+        return Interval.fromDateTimes(start, end);
+      }
+
+      if (start.isValid) {
+        const dur = Duration.fromISO(e, opts);
+        if (dur.isValid) {
+          return Interval.after(start, dur);
+        }
+      } else if (end.isValid) {
+        const dur = Duration.fromISO(s, opts);
+        if (dur.isValid) {
+          return Interval.before(end, dur);
+        }
+      }
+    }
+    return Interval.invalid("unparsable", `the input "${text}" can't be parsed asISO 8601`);
+  }
+
+  /**
+   * Check if an object is an Interval. Works across context boundaries
+   * @param {object} o
+   * @return {boolean}
+   */
+  static isInterval(o) {
+    return (o && o.isLuxonInterval) || false;
+  }
+
+  /**
+   * Returns the start of the Interval
+   * @type {DateTime}
+   */
+  get start() {
+    return this.isValid ? this.s : null;
+  }
+
+  /**
+   * Returns the end of the Interval
+   * @type {DateTime}
+   */
+  get end() {
+    return this.isValid ? this.e : null;
+  }
+
+  /**
+   * Returns whether this Interval's end is at least its start, meaning that the Interval isn't 'backwards'.
+   * @type {boolean}
+   */
+  get isValid() {
+    return this.invalidReason === null;
+  }
+
+  /**
+   * Returns an error code if this Interval is invalid, or null if the Interval is valid
+   * @type {string}
+   */
+  get invalidReason() {
+    return this.invalid ? this.invalid.reason : null;
+  }
+
+  /**
+   * Returns an explanation of why this Interval became invalid, or null if the Interval is valid
+   * @type {string}
+   */
+  get invalidExplanation() {
+    return this.invalid ? this.invalid.explanation : null;
+  }
+
+  /**
+   * Returns the length of the Interval in the specified unit.
+   * @param {string} unit - the unit (such as 'hours' or 'days') to return the length in.
+   * @return {number}
+   */
+  length(unit = "milliseconds") {
+    return this.isValid ? this.toDuration(...[unit]).get(unit) : NaN;
+  }
+
+  /**
+   * Returns the count of minutes, hours, days, months, or years included in the Interval, even in part.
+   * Unlike {@link length} this counts sections of the calendar, not periods of time, e.g. specifying 'day'
+   * asks 'what dates are included in this interval?', not 'how many days long is this interval?'
+   * @param {string} [unit='milliseconds'] - the unit of time to count.
+   * @return {number}
+   */
+  count(unit = "milliseconds") {
+    if (!this.isValid) return NaN;
+    const start = this.start.startOf(unit),
+      end = this.end.startOf(unit);
+    return Math.floor(end.diff(start, unit).get(unit)) + 1;
+  }
+
+  /**
+   * Returns whether this Interval's start and end are both in the same unit of time
+   * @param {string} unit - the unit of time to check sameness on
+   * @return {boolean}
+   */
+  hasSame(unit) {
+    return this.isValid ? this.e.minus(1).hasSame(this.s, unit) : false;
+  }
+
+  /**
+   * Return whether this Interval has the same start and end DateTimes.
+   * @return {boolean}
+   */
+  isEmpty() {
+    return this.s.valueOf() === this.e.valueOf();
+  }
+
+  /**
+   * Return whether this Interval's start is after the specified DateTime.
+   * @param {DateTime} dateTime
+   * @return {boolean}
+   */
+  isAfter(dateTime) {
+    if (!this.isValid) return false;
+    return this.s > dateTime;
+  }
+
+  /**
+   * Return whether this Interval's end is before the specified DateTime.
+   * @param {DateTime} dateTime
+   * @return {boolean}
+   */
+  isBefore(dateTime) {
+    if (!this.isValid) return false;
+    return this.e <= dateTime;
+  }
+
+  /**
+   * Return whether this Interval contains the specified DateTime.
+   * @param {DateTime} dateTime
+   * @return {boolean}
+   */
+  contains(dateTime) {
+    if (!this.isValid) return false;
+    return this.s <= dateTime && this.e > dateTime;
+  }
+
+  /**
+   * "Sets" the start and/or end dates. Returns a newly-constructed Interval.
+   * @param {Object} values - the values to set
+   * @param {DateTime} values.start - the starting DateTime
+   * @param {DateTime} values.end - the ending DateTime
+   * @return {Interval}
+   */
+  set({ start, end } = {}) {
+    if (!this.isValid) return this;
+    return Interval.fromDateTimes(start || this.s, end || this.e);
+  }
+
+  /**
+   * Split this Interval at each of the specified DateTimes
+   * @param {...[DateTime]} dateTimes - the unit of time to count.
+   * @return {[Interval]}
+   */
+  splitAt(...dateTimes) {
+    if (!this.isValid) return [];
+    const sorted = dateTimes
+        .map(friendlyDateTime)
+        .filter(d => this.contains(d))
+        .sort(),
+      results = [];
+    let { s } = this,
+      i = 0;
+
+    while (s < this.e) {
+      const added = sorted[i] || this.e,
+        next = +added > +this.e ? this.e : added;
+      results.push(Interval.fromDateTimes(s, next));
+      s = next;
+      i += 1;
+    }
+
+    return results;
+  }
+
+  /**
+   * Split this Interval into smaller Intervals, each of the specified length.
+   * Left over time is grouped into a smaller interval
+   * @param {Duration|Object|number} duration - The length of each resulting interval.
+   * @return {[Interval]}
+   */
+  splitBy(duration) {
+    const dur = friendlyDuration(duration);
+
+    if (!this.isValid || !dur.isValid || dur.as("milliseconds") === 0) {
+      return [];
+    }
+
+    let { s } = this,
+      added,
+      next;
+
+    const results = [];
+    while (s < this.e) {
+      added = s.plus(dur);
+      next = +added > +this.e ? this.e : added;
+      results.push(Interval.fromDateTimes(s, next));
+      s = next;
+    }
+
+    return results;
+  }
+
+  /**
+   * Split this Interval into the specified number of smaller intervals.
+   * @param {number} numberOfParts - The number of Intervals to divide the Interval into.
+   * @return {[Interval]}
+   */
+  divideEqually(numberOfParts) {
+    if (!this.isValid) return [];
+    return this.splitBy(this.length() / numberOfParts).slice(0, numberOfParts);
+  }
+
+  /**
+   * Return whether this Interval overlaps with the specified Interval
+   * @param {Interval} other
+   * @return {boolean}
+   */
+  overlaps(other) {
+    return this.e > other.s && this.s < other.e;
+  }
+
+  /**
+   * Return whether this Interval's end is adjacent to the specified Interval's start.
+   * @param {Interval} other
+   * @return {boolean}
+   */
+  abutsStart(other) {
+    if (!this.isValid) return false;
+    return +this.e === +other.s;
+  }
+
+  /**
+   * Return whether this Interval's start is adjacent to the specified Interval's end.
+   * @param {Interval} other
+   * @return {boolean}
+   */
+  abutsEnd(other) {
+    if (!this.isValid) return false;
+    return +other.e === +this.s;
+  }
+
+  /**
+   * Return whether this Interval engulfs the start and end of the specified Interval.
+   * @param {Interval} other
+   * @return {boolean}
+   */
+  engulfs(other) {
+    if (!this.isValid) return false;
+    return this.s <= other.s && this.e >= other.e;
+  }
+
+  /**
+   * Return whether this Interval has the same start and end as the specified Interval.
+   * @param {Interval} other
+   * @return {boolean}
+   */
+  equals(other) {
+    if (!this.isValid || !other.isValid) {
+      return false;
+    }
+
+    return this.s.equals(other.s) && this.e.equals(other.e);
+  }
+
+  /**
+   * Return an Interval representing the intersection of this Interval and the specified Interval.
+   * Specifically, the resulting Interval has the maximum start time and the minimum end time of the two Intervals.
+   * Returns null if the intersection is empty, meaning, the intervals don't intersect.
+   * @param {Interval} other
+   * @return {Interval}
+   */
+  intersection(other) {
+    if (!this.isValid) return this;
+    const s = this.s > other.s ? this.s : other.s,
+      e = this.e < other.e ? this.e : other.e;
+
+    if (s > e) {
+      return null;
+    } else {
+      return Interval.fromDateTimes(s, e);
+    }
+  }
+
+  /**
+   * Return an Interval representing the union of this Interval and the specified Interval.
+   * Specifically, the resulting Interval has the minimum start time and the maximum end time of the two Intervals.
+   * @param {Interval} other
+   * @return {Interval}
+   */
+  union(other) {
+    if (!this.isValid) return this;
+    const s = this.s < other.s ? this.s : other.s,
+      e = this.e > other.e ? this.e : other.e;
+    return Interval.fromDateTimes(s, e);
+  }
+
+  /**
+   * Merge an array of Intervals into a equivalent minimal set of Intervals.
+   * Combines overlapping and adjacent Intervals.
+   * @param {[Interval]} intervals
+   * @return {[Interval]}
+   */
+  static merge(intervals) {
+    const [found, final] = intervals.sort((a, b) => a.s - b.s).reduce(
+      ([sofar, current], item) => {
+        if (!current) {
+          return [sofar, item];
+        } else if (current.overlaps(item) || current.abutsStart(item)) {
+          return [sofar, current.union(item)];
+        } else {
+          return [sofar.concat([current]), item];
+        }
+      },
+      [[], null]
+    );
+    if (final) {
+      found.push(final);
+    }
+    return found;
+  }
+
+  /**
+   * Return an array of Intervals representing the spans of time that only appear in one of the specified Intervals.
+   * @param {[Interval]} intervals
+   * @return {[Interval]}
+   */
+  static xor(intervals) {
+    let start = null,
+      currentCount = 0;
+    const results = [],
+      ends = intervals.map(i => [{ time: i.s, type: "s" }, { time: i.e, type: "e" }]),
+      flattened = Array.prototype.concat(...ends),
+      arr = flattened.sort((a, b) => a.time - b.time);
+
+    for (const i of arr) {
+      currentCount += i.type === "s" ? 1 : -1;
+
+      if (currentCount === 1) {
+        start = i.time;
+      } else {
+        if (start && +start !== +i.time) {
+          results.push(Interval.fromDateTimes(start, i.time));
+        }
+
+        start = null;
+      }
+    }
+
+    return Interval.merge(results);
+  }
+
+  /**
+   * Return an Interval representing the span of time in this Interval that doesn't overlap with any of the specified Intervals.
+   * @param {...Interval} intervals
+   * @return {[Interval]}
+   */
+  difference(...intervals) {
+    return Interval.xor([this].concat(intervals))
+      .map(i => this.intersection(i))
+      .filter(i => i && !i.isEmpty());
+  }
+
+  /**
+   * Returns a string representation of this Interval appropriate for debugging.
+   * @return {string}
+   */
+  toString() {
+    if (!this.isValid) return INVALID;
+    return `[${this.s.toISO()} – ${this.e.toISO()})`;
+  }
+
+  /**
+   * Returns an ISO 8601-compliant string representation of this Interval.
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Time_intervals
+   * @param {Object} opts - The same options as {@link DateTime.toISO}
+   * @return {string}
+   */
+  toISO(opts) {
+    if (!this.isValid) return INVALID;
+    return `${this.s.toISO(opts)}/${this.e.toISO(opts)}`;
+  }
+
+  /**
+   * Returns an ISO 8601-compliant string representation of date of this Interval.
+   * The time components are ignored.
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Time_intervals
+   * @return {string}
+   */
+  toISODate() {
+    if (!this.isValid) return INVALID;
+    return `${this.s.toISODate()}/${this.e.toISODate()}`;
+  }
+
+  /**
+   * Returns an ISO 8601-compliant string representation of time of this Interval.
+   * The date components are ignored.
+   * @see https://en.wikipedia.org/wiki/ISO_8601#Time_intervals
+   * @param {Object} opts - The same options as {@link DateTime.toISO}
+   * @return {string}
+   */
+  toISOTime(opts) {
+    if (!this.isValid) return INVALID;
+    return `${this.s.toISOTime(opts)}/${this.e.toISOTime(opts)}`;
+  }
+
+  /**
+   * Returns a string representation of this Interval formatted according to the specified format string.
+   * @param {string} dateFormat - the format string. This string formats the start and end time. See {@link DateTime.toFormat} for details.
+   * @param {Object} opts - options
+   * @param {string} [opts.separator =  ' – '] - a separator to place between the start and end representations
+   * @return {string}
+   */
+  toFormat(dateFormat, { separator = " – " } = {}) {
+    if (!this.isValid) return INVALID;
+    return `${this.s.toFormat(dateFormat)}${separator}${this.e.toFormat(dateFormat)}`;
+  }
+
+  /**
+   * Return a Duration representing the time spanned by this interval.
+   * @param {string|string[]} [unit=['milliseconds']] - the unit or units (such as 'hours' or 'days') to include in the duration.
+   * @param {Object} opts - options that affect the creation of the Duration
+   * @param {string} [opts.conversionAccuracy='casual'] - the conversion system to use
+   * @example Interval.fromDateTimes(dt1, dt2).toDuration().toObject() //=> { milliseconds: 88489257 }
+   * @example Interval.fromDateTimes(dt1, dt2).toDuration('days').toObject() //=> { days: 1.0241812152777778 }
+   * @example Interval.fromDateTimes(dt1, dt2).toDuration(['hours', 'minutes']).toObject() //=> { hours: 24, minutes: 34.82095 }
+   * @example Interval.fromDateTimes(dt1, dt2).toDuration(['hours', 'minutes', 'seconds']).toObject() //=> { hours: 24, minutes: 34, seconds: 49.257 }
+   * @example Interval.fromDateTimes(dt1, dt2).toDuration('seconds').toObject() //=> { seconds: 88489.257 }
+   * @return {Duration}
+   */
+  toDuration(unit, opts) {
+    if (!this.isValid) {
+      return Duration.invalid(this.invalidReason);
+    }
+    return this.e.diff(this.s, unit, opts);
+  }
+
+  /**
+   * Run mapFn on the interval start and end, returning a new Interval from the resulting DateTimes
+   * @param {function} mapFn
+   * @return {Interval}
+   * @example Interval.fromDateTimes(dt1, dt2).mapEndpoints(endpoint => endpoint.toUTC())
+   * @example Interval.fromDateTimes(dt1, dt2).mapEndpoints(endpoint => endpoint.plus({ hours: 2 }))
+   */
+  mapEndpoints(mapFn) {
+    return Interval.fromDateTimes(mapFn(this.s), mapFn(this.e));
+  }
+}

node_modules/luxon/src/luxon.js

@@ -0,0 +1,23 @@
+import DateTime from "./datetime.js";
+import Duration from "./duration.js";
+import Interval from "./interval.js";
+import Info from "./info.js";
+import Zone from "./zone.js";
+import FixedOffsetZone from "./zones/fixedOffsetZone.js";
+import IANAZone from "./zones/IANAZone.js";
+import InvalidZone from "./zones/invalidZone.js";
+import LocalZone from "./zones/localZone.js";
+import Settings from "./settings.js";
+
+export {
+  DateTime,
+  Duration,
+  Interval,
+  Info,
+  Zone,
+  FixedOffsetZone,
+  IANAZone,
+  InvalidZone,
+  LocalZone,
+  Settings
+};

node_modules/luxon/src/luxonFilled.js

@@ -0,0 +1,13 @@
+/* eslint import/no-extraneous-dependencies: off */
+
+import "core-js/es6/symbol.js";
+import "core-js/es6/object.js";
+import "core-js/fn/symbol/iterator.js";
+import "core-js/fn/number/is-nan.js";
+import "core-js/es6/array.js";
+import "core-js/fn/string/virtual/starts-with.js";
+import "core-js/fn/string/virtual/repeat.js";
+import "core-js/fn/math/trunc.js";
+import "core-js/fn/math/sign.js";
+
+export * from "./luxon.js";

node_modules/luxon/src/settings.js

@@ -0,0 +1,137 @@
+import LocalZone from "./zones/localZone.js";
+import IANAZone from "./zones/IANAZone.js";
+import Locale from "./impl/locale.js";
+
+import { normalizeZone } from "./impl/zoneUtil.js";
+
+let now = () => Date.now(),
+  defaultZone = null, // not setting this directly to LocalZone.instance bc loading order issues
+  defaultLocale = null,
+  defaultNumberingSystem = null,
+  defaultOutputCalendar = null,
+  throwOnInvalid = false;
+
+/**
+ * Settings contains static getters and setters that control Luxon's overall behavior. Luxon is a simple library with few options, but the ones it does have live here.
+ */
+export default class Settings {
+  /**
+   * Get the callback for returning the current timestamp.
+   * @type {function}
+   */
+  static get now() {
+    return now;
+  }
+
+  /**
+   * Set the callback for returning the current timestamp.
+   * The function should return a number, which will be interpreted as an Epoch millisecond count
+   * @type {function}
+   * @example Settings.now = () => Date.now() + 3000 // pretend it is 3 seconds in the future
+   * @example Settings.now = () => 0 // always pretend it's Jan 1, 1970 at midnight in UTC time
+   */
+  static set now(n) {
+    now = n;
+  }
+
+  /**
+   * Get the default time zone to create DateTimes in.
+   * @type {string}
+   */
+  static get defaultZoneName() {
+    return Settings.defaultZone.name;
+  }
+
+  /**
+   * Set the default time zone to create DateTimes in. Does not affect existing instances.
+   * @type {string}
+   */
+  static set defaultZoneName(z) {
+    if (!z) {
+      defaultZone = null;
+    } else {
+      defaultZone = normalizeZone(z);
+    }
+  }
+
+  /**
+   * Get the default time zone object to create DateTimes in. Does not affect existing instances.
+   * @type {Zone}
+   */
+  static get defaultZone() {
+    return defaultZone || LocalZone.instance;
+  }
+
+  /**
+   * Get the default locale to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static get defaultLocale() {
+    return defaultLocale;
+  }
+
+  /**
+   * Set the default locale to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static set defaultLocale(locale) {
+    defaultLocale = locale;
+  }
+
+  /**
+   * Get the default numbering system to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static get defaultNumberingSystem() {
+    return defaultNumberingSystem;
+  }
+
+  /**
+   * Set the default numbering system to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static set defaultNumberingSystem(numberingSystem) {
+    defaultNumberingSystem = numberingSystem;
+  }
+
+  /**
+   * Get the default output calendar to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static get defaultOutputCalendar() {
+    return defaultOutputCalendar;
+  }
+
+  /**
+   * Set the default output calendar to create DateTimes with. Does not affect existing instances.
+   * @type {string}
+   */
+  static set defaultOutputCalendar(outputCalendar) {
+    defaultOutputCalendar = outputCalendar;
+  }
+
+  /**
+   * Get whether Luxon will throw when it encounters invalid DateTimes, Durations, or Intervals
+   * @type {boolean}
+   */
+  static get throwOnInvalid() {
+    return throwOnInvalid;
+  }
+
+  /**
+   * Set whether Luxon will throw when it encounters invalid DateTimes, Durations, or Intervals
+   * @type {boolean}
+   */
+  static set throwOnInvalid(t) {
+    throwOnInvalid = t;
+  }
+
+  /**
+   * Reset Luxon's global caches. Should only be necessary in testing scenarios.
+   * @return {void}
+   */
+  static resetCaches() {
+    Locale.resetCache();
+    IANAZone.resetCache();
+  }
+}

node_modules/luxon/src/zone.js

@@ -0,0 +1,88 @@
+/* eslint no-unused-vars: "off" */
+import { ZoneIsAbstractError } from "./errors.js";
+
+/**
+ * @interface
+ */
+export default class Zone {
+  /**
+   * The type of zone
+   * @abstract
+   * @type {string}
+   */
+  get type() {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * The name of this zone.
+   * @abstract
+   * @type {string}
+   */
+  get name() {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Returns whether the offset is known to be fixed for the whole year.
+   * @abstract
+   * @type {boolean}
+   */
+  get universal() {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Returns the offset's common name (such as EST) at the specified timestamp
+   * @abstract
+   * @param {number} ts - Epoch milliseconds for which to get the name
+   * @param {Object} opts - Options to affect the format
+   * @param {string} opts.format - What style of offset to return. Accepts 'long' or 'short'.
+   * @param {string} opts.locale - What locale to return the offset name in.
+   * @return {string}
+   */
+  offsetName(ts, opts) {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Returns the offset's value as a string
+   * @abstract
+   * @param {number} ts - Epoch milliseconds for which to get the offset
+   * @param {string} format - What style of offset to return.
+   *                          Accepts 'narrow', 'short', or 'techie'. Returning '+6', '+06:00', or '+0600' respectively
+   * @return {string}
+   */
+  formatOffset(ts, format) {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Return the offset in minutes for this zone at the specified timestamp.
+   * @abstract
+   * @param {number} ts - Epoch milliseconds for which to compute the offset
+   * @return {number}
+   */
+  offset(ts) {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Return whether this Zone is equal to another zone
+   * @abstract
+   * @param {Zone} otherZone - the zone to compare
+   * @return {boolean}
+   */
+  equals(otherZone) {
+    throw new ZoneIsAbstractError();
+  }
+
+  /**
+   * Return whether this Zone is valid.
+   * @abstract
+   * @type {boolean}
+   */
+  get isValid() {
+    throw new ZoneIsAbstractError();
+  }
+}

node_modules/luxon/src/zones/IANAZone.js

@@ -0,0 +1,175 @@
+import { formatOffset, parseZoneInfo, isUndefined, ianaRegex, objToLocalTS } from "../impl/util.js";
+import Zone from "../zone.js";
+
+const matchingRegex = RegExp(`^${ianaRegex.source}$`);
+
+let dtfCache = {};
+function makeDTF(zone) {
+  if (!dtfCache[zone]) {
+    dtfCache[zone] = new Intl.DateTimeFormat("en-US", {
+      hour12: false,
+      timeZone: zone,
+      year: "numeric",
+      month: "2-digit",
+      day: "2-digit",
+      hour: "2-digit",
+      minute: "2-digit",
+      second: "2-digit"
+    });
+  }
+  return dtfCache[zone];
+}
+
+const typeToPos = {
+  year: 0,
+  month: 1,
+  day: 2,
+  hour: 3,
+  minute: 4,
+  second: 5
+};
+
+function hackyOffset(dtf, date) {
+  const formatted = dtf.format(date).replace(/\u200E/g, ""),
+    parsed = /(\d+)\/(\d+)\/(\d+),? (\d+):(\d+):(\d+)/.exec(formatted),
+    [, fMonth, fDay, fYear, fHour, fMinute, fSecond] = parsed;
+  return [fYear, fMonth, fDay, fHour, fMinute, fSecond];
+}
+
+function partsOffset(dtf, date) {
+  const formatted = dtf.formatToParts(date),
+    filled = [];
+  for (let i = 0; i < formatted.length; i++) {
+    const { type, value } = formatted[i],
+      pos = typeToPos[type];
+
+    if (!isUndefined(pos)) {
+      filled[pos] = parseInt(value, 10);
+    }
+  }
+  return filled;
+}
+
+let ianaZoneCache = {};
+/**
+ * A zone identified by an IANA identifier, like America/New_York
+ * @implements {Zone}
+ */
+export default class IANAZone extends Zone {
+  /**
+   * @param {string} name - Zone name
+   * @return {IANAZone}
+   */
+  static create(name) {
+    if (!ianaZoneCache[name]) {
+      ianaZoneCache[name] = new IANAZone(name);
+    }
+    return ianaZoneCache[name];
+  }
+
+  /**
+   * Reset local caches. Should only be necessary in testing scenarios.
+   * @return {void}
+   */
+  static resetCache() {
+    ianaZoneCache = {};
+    dtfCache = {};
+  }
+
+  /**
+   * Returns whether the provided string is a valid specifier. This only checks the string's format, not that the specifier identifies a known zone; see isValidZone for that.
+   * @param {string} s - The string to check validity on
+   * @example IANAZone.isValidSpecifier("America/New_York") //=> true
+   * @example IANAZone.isValidSpecifier("Fantasia/Castle") //=> true
+   * @example IANAZone.isValidSpecifier("Sport~~blorp") //=> false
+   * @return {boolean}
+   */
+  static isValidSpecifier(s) {
+    return !!(s && s.match(matchingRegex));
+  }
+
+  /**
+   * Returns whether the provided string identifies a real zone
+   * @param {string} zone - The string to check
+   * @example IANAZone.isValidZone("America/New_York") //=> true
+   * @example IANAZone.isValidZone("Fantasia/Castle") //=> false
+   * @example IANAZone.isValidZone("Sport~~blorp") //=> false
+   * @return {boolean}
+   */
+  static isValidZone(zone) {
+    try {
+      new Intl.DateTimeFormat("en-US", { timeZone: zone }).format();
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  // Etc/GMT+8 -> -480
+  /** @ignore */
+  static parseGMTOffset(specifier) {
+    if (specifier) {
+      const match = specifier.match(/^Etc\/GMT([+-]\d{1,2})$/i);
+      if (match) {
+        return -60 * parseInt(match[1]);
+      }
+    }
+    return null;
+  }
+
+  constructor(name) {
+    super();
+    /** @private **/
+    this.zoneName = name;
+    /** @private **/
+    this.valid = IANAZone.isValidZone(name);
+  }
+
+  /** @override **/
+  get type() {
+    return "iana";
+  }
+
+  /** @override **/
+  get name() {
+    return this.zoneName;
+  }
+
+  /** @override **/
+  get universal() {
+    return false;
+  }
+
+  /** @override **/
+  offsetName(ts, { format, locale }) {
+    return parseZoneInfo(ts, format, locale, this.name);
+  }
+
+  /** @override **/
+  formatOffset(ts, format) {
+    return formatOffset(this.offset(ts), format);
+  }
+
+  /** @override **/
+  offset(ts) {
+    const date = new Date(ts),
+      dtf = makeDTF(this.name),
+      [year, month, day, hour, minute, second] = dtf.formatToParts
+        ? partsOffset(dtf, date)
+        : hackyOffset(dtf, date);
+    const asUTC = objToLocalTS({ year, month, day, hour, minute, second, millisecond: 0 });
+    let asTS = date.valueOf();
+    asTS -= asTS % 1000;
+    return (asUTC - asTS) / (60 * 1000);
+  }
+
+  /** @override **/
+  equals(otherZone) {
+    return otherZone.type === "iana" && otherZone.name === this.name;
+  }
+
+  /** @override **/
+  get isValid() {
+    return this.valid;
+  }
+}

node_modules/luxon/src/zones/fixedOffsetZone.js

@@ -0,0 +1,94 @@
+import { formatOffset, signedOffset } from "../impl/util.js";
+import Zone from "../zone.js";
+
+let singleton = null;
+
+/**
+ * A zone with a fixed offset (meaning no DST)
+ * @implements {Zone}
+ */
+export default class FixedOffsetZone extends Zone {
+  /**
+   * Get a singleton instance of UTC
+   * @return {FixedOffsetZone}
+   */
+  static get utcInstance() {
+    if (singleton === null) {
+      singleton = new FixedOffsetZone(0);
+    }
+    return singleton;
+  }
+
+  /**
+   * Get an instance with a specified offset
+   * @param {number} offset - The offset in minutes
+   * @return {FixedOffsetZone}
+   */
+  static instance(offset) {
+    return offset === 0 ? FixedOffsetZone.utcInstance : new FixedOffsetZone(offset);
+  }
+
+  /**
+   * Get an instance of FixedOffsetZone from a UTC offset string, like "UTC+6"
+   * @param {string} s - The offset string to parse
+   * @example FixedOffsetZone.parseSpecifier("UTC+6")
+   * @example FixedOffsetZone.parseSpecifier("UTC+06")
+   * @example FixedOffsetZone.parseSpecifier("UTC-6:00")
+   * @return {FixedOffsetZone}
+   */
+  static parseSpecifier(s) {
+    if (s) {
+      const r = s.match(/^utc(?:([+-]\d{1,2})(?::(\d{2}))?)?$/i);
+      if (r) {
+        return new FixedOffsetZone(signedOffset(r[1], r[2]));
+      }
+    }
+    return null;
+  }
+
+  constructor(offset) {
+    super();
+    /** @private **/
+    this.fixed = offset;
+  }
+
+  /** @override **/
+  get type() {
+    return "fixed";
+  }
+
+  /** @override **/
+  get name() {
+    return this.fixed === 0 ? "UTC" : `UTC${formatOffset(this.fixed, "narrow")}`;
+  }
+
+  /** @override **/
+  offsetName() {
+    return this.name;
+  }
+
+  /** @override **/
+  formatOffset(ts, format) {
+    return formatOffset(this.fixed, format);
+  }
+
+  /** @override **/
+  get universal() {
+    return true;
+  }
+
+  /** @override **/
+  offset() {
+    return this.fixed;
+  }
+
+  /** @override **/
+  equals(otherZone) {
+    return otherZone.type === "fixed" && otherZone.fixed === this.fixed;
+  }
+
+  /** @override **/
+  get isValid() {
+    return true;
+  }
+}

node_modules/luxon/src/zones/invalidZone.js

@@ -0,0 +1,53 @@
+import Zone from "../zone.js";
+
+/**
+ * A zone that failed to parse. You should never need to instantiate this.
+ * @implements {Zone}
+ */
+export default class InvalidZone extends Zone {
+  constructor(zoneName) {
+    super();
+    /**  @private */
+    this.zoneName = zoneName;
+  }
+
+  /** @override **/
+  get type() {
+    return "invalid";
+  }
+
+  /** @override **/
+  get name() {
+    return this.zoneName;
+  }
+
+  /** @override **/
+  get universal() {
+    return false;
+  }
+
+  /** @override **/
+  offsetName() {
+    return null;
+  }
+
+  /** @override **/
+  formatOffset() {
+    return "";
+  }
+
+  /** @override **/
+  offset() {
+    return NaN;
+  }
+
+  /** @override **/
+  equals() {
+    return false;
+  }
+
+  /** @override **/
+  get isValid() {
+    return false;
+  }
+}

node_modules/luxon/src/zones/localZone.js

@@ -0,0 +1,63 @@
+import { formatOffset, parseZoneInfo, hasIntl } from "../impl/util.js";
+import Zone from "../zone.js";
+
+let singleton = null;
+
+/**
+ * Represents the local zone for this Javascript environment.
+ * @implements {Zone}
+ */
+export default class LocalZone extends Zone {
+  /**
+   * Get a singleton instance of the local zone
+   * @return {LocalZone}
+   */
+  static get instance() {
+    if (singleton === null) {
+      singleton = new LocalZone();
+    }
+    return singleton;
+  }
+
+  /** @override **/
+  get type() {
+    return "local";
+  }
+
+  /** @override **/
+  get name() {
+    if (hasIntl()) {
+      return new Intl.DateTimeFormat().resolvedOptions().timeZone;
+    } else return "local";
+  }
+
+  /** @override **/
+  get universal() {
+    return false;
+  }
+
+  /** @override **/
+  offsetName(ts, { format, locale }) {
+    return parseZoneInfo(ts, format, locale);
+  }
+
+  /** @override **/
+  formatOffset(ts, format) {
+    return formatOffset(this.offset(ts), format);
+  }
+
+  /** @override **/
+  offset(ts) {
+    return -new Date(ts).getTimezoneOffset();
+  }
+
+  /** @override **/
+  equals(otherZone) {
+    return otherZone.type === "local";
+  }
+
+  /** @override **/
+  get isValid() {
+    return true;
+  }
+}