test: add markdownlint-cli dependency + npm script

package-lock.json

@@ -6786,6 +6786,12 @@
       "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.3.tgz",
       "integrity": "sha512-a30VEBm4PEdx1dRB7MFK7BejejvCvBronbLjht+sHuGYj8PHs7M/5Z+rt5lw551vZ7yfTCj4Vuyy3mSJytDWRQ=="
     },
+    "graceful-readlink": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/graceful-readlink/-/graceful-readlink-1.0.1.tgz",
+      "integrity": "sha1-TK+tdrxi8C+gObL5Tpo906ORpyU=",
+      "dev": true
+    },
     "grapheme-breaker": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/grapheme-breaker/-/grapheme-breaker-0.3.2.tgz",
@@ -8135,6 +8141,12 @@
         "minimist": "^1.2.0"
       }
     },
+    "jsonc-parser": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-2.2.1.tgz",
+      "integrity": "sha512-o6/yDBYccGvTz1+QFevz6l6OBZ2+fMVu2JZ9CIhzsYRX4mjaK5IyX9eldUdCmga16zlgQxyrj5pt9kzuj2C02w==",
+      "dev": true
+    },
     "jsonfile": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-3.0.1.tgz",
@@ -8806,6 +8818,18 @@
       "integrity": "sha1-4j8/nE+Pvd6HJSnBBxhXoIblzO8=",
       "dev": true
     },
+    "lodash.differencewith": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.differencewith/-/lodash.differencewith-4.5.0.tgz",
+      "integrity": "sha1-uvr7yRi1UVTheRdqALsK76rIVLc=",
+      "dev": true
+    },
+    "lodash.flatten": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/lodash.flatten/-/lodash.flatten-4.4.0.tgz",
+      "integrity": "sha1-8xwiIlqWMtK7+OSt2+8kCqdlph8=",
+      "dev": true
+    },
     "lodash.flattendeep": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/lodash.flattendeep/-/lodash.flattendeep-4.4.0.tgz",
@@ -9030,6 +9054,93 @@
       "integrity": "sha512-1RUZVgQlpJSPWYbFSpmudq5nHY1doEIv89gBtF0s4gW1GF2XorxcA/70M5vq7rLv0a6mhOUccRsqkwhwLCIQ2Q==",
       "dev": true
     },
+    "markdownlint": {
+      "version": "0.20.3",
+      "resolved": "https://registry.npmjs.org/markdownlint/-/markdownlint-0.20.3.tgz",
+      "integrity": "sha512-J93s59tGvSFvAPWVUtEgxqPI0CHayTx1Z8poj1/4UJAquHGPIruWRMurkRldiNbgBiaQ4OOt15rHZbFfU6u05A==",
+      "dev": true,
+      "requires": {
+        "markdown-it": "10.0.0"
+      },
+      "dependencies": {
+        "entities": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/entities/-/entities-2.0.2.tgz",
+          "integrity": "sha512-dmD3AvJQBUjKpcNkoqr+x+IF0SdRtPz9Vk0uTy4yWqga9ibB6s4v++QFWNohjiUGoMlF552ZvNyXDxz5iW0qmw==",
+          "dev": true
+        },
+        "markdown-it": {
+          "version": "10.0.0",
+          "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-10.0.0.tgz",
+          "integrity": "sha512-YWOP1j7UbDNz+TumYP1kpwnP0aEa711cJjrAQrzd0UXlbJfc5aAq0F/PZHjiioqDC1NKgvIMX+o+9Bk7yuM2dg==",
+          "dev": true,
+          "requires": {
+            "argparse": "^1.0.7",
+            "entities": "~2.0.0",
+            "linkify-it": "^2.0.0",
+            "mdurl": "^1.0.1",
+            "uc.micro": "^1.0.5"
+          }
+        }
+      }
+    },
+    "markdownlint-cli": {
+      "version": "0.23.0",
+      "resolved": "https://registry.npmjs.org/markdownlint-cli/-/markdownlint-cli-0.23.0.tgz",
+      "integrity": "sha512-qkr0OB86Q8PTIVUbzninYEhdEsj3h6rELNcyFEo5ejOkMZo55f03NwlWzGMGGWVz/L1GANN/HdidhpjMPv5vUg==",
+      "dev": true,
+      "requires": {
+        "commander": "~2.9.0",
+        "deep-extend": "~0.5.1",
+        "get-stdin": "~5.0.1",
+        "glob": "~7.1.2",
+        "ignore": "~5.1.4",
+        "js-yaml": "~3.13.1",
+        "jsonc-parser": "~2.2.0",
+        "lodash.differencewith": "~4.5.0",
+        "lodash.flatten": "~4.4.0",
+        "markdownlint": "~0.20.2",
+        "markdownlint-rule-helpers": "~0.9.0",
+        "minimatch": "~3.0.4",
+        "minimist": "~1.2.5",
+        "rc": "~1.2.7"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.9.0",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
+          "integrity": "sha1-nJkJQXbhIkDLItbFFGCYQA/g99Q=",
+          "dev": true,
+          "requires": {
+            "graceful-readlink": ">= 1.0.0"
+          }
+        },
+        "deep-extend": {
+          "version": "0.5.1",
+          "resolved": "https://registry.npmjs.org/deep-extend/-/deep-extend-0.5.1.tgz",
+          "integrity": "sha512-N8vBdOa+DF7zkRrDCsaOXoCs/E2fJfx9B9MrKnnSiHNh4ws7eSys6YQE4KvT1cecKmOASYQBhbKjeuDD9lT81w==",
+          "dev": true
+        },
+        "get-stdin": {
+          "version": "5.0.1",
+          "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-5.0.1.tgz",
+          "integrity": "sha1-Ei4WFZHiH/TFJTAwVpPyDmOTo5g=",
+          "dev": true
+        },
+        "minimist": {
+          "version": "1.2.5",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+          "dev": true
+        }
+      }
+    },
+    "markdownlint-rule-helpers": {
+      "version": "0.9.0",
+      "resolved": "https://registry.npmjs.org/markdownlint-rule-helpers/-/markdownlint-rule-helpers-0.9.0.tgz",
+      "integrity": "sha512-ySKvg7tlOAxLzGZyu3J3pKGGNHAQgQNcZOMFRd2b5MrhA00j40XYL1mtAI34NzCbVfvhnPPynh5AsJoL+uRHcw==",
+      "dev": true
+    },
     "matcher": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/matcher/-/matcher-2.1.0.tgz",

package.json

@@ -9,9 +9,10 @@
     "build:site": "eleventy",
     "build": "npm run build:css && npm run build:site",
     "create-definitions": "bin/create-definitions",
-    "lint": "npm run lint:css && npm run lint:js",
+    "lint": "npm run lint:css && npm run lint:js && npm run lint:markdown",
     "lint:css": "stylelint \"assets/css/**/*.scss\"",
     "lint:js": "eslint \"11ty/**/*.js\"",
+    "lint:markdown": "markdownlint '**/*.md' --ignore node_modules",
     "serve": "concurrently \"npm run serve:site\" \"npm run watch:css\"",
     "serve:site": "eleventy --serve",
     "test": "ava",
@@ -63,6 +64,7 @@
     "esm": "^3.2.25",
     "husky": "^4.2.3",
     "lint-staged": "^10.0.7",
+    "markdownlint-cli": "^0.23.0",
     "parcel-bundler": "^1.12.4",
     "prettier": "^1.19.1",
     "sass": "^1.23.7",