Merge branch 'master' into develop

# Conflicts:
#	changelog.md
#	dist/plyr.js.map
#	dist/plyr.min.js.map
#	dist/plyr.polyfilled.js.map
#	dist/plyr.polyfilled.min.js.map
#	package.json

package.json

@@ -1,6 +1,6 @@
 {
     "name": "plyr",
-    "version": "3.3.17",
+    "version": "3.3.22",
     "description":
         "A simple, accessible and customizable HTML5, YouTube and Vimeo media player",
     "homepage": "https://plyr.io",
@@ -31,7 +31,8 @@
     },
     "scripts": {
         "build": "gulp build",
-        "lint": "eslint src/js",
+        "lint": "eslint src/js && npm run-script remark",
+        "remark": "remark -f --use 'validate-links=repository:\"sampotts/plyr\"' '{,!(node_modules),.?**/}*.md'",
         "test": "echo \"Error: no test specified\" && exit 1"
     },
     "devDependencies": {
@@ -67,6 +68,8 @@
         "postcss-custom-properties": "^7.0.0",
         "prettier-eslint": "^8.8.2",
         "prettier-stylelint": "^0.4.2",
+        "remark-cli": "^5.0.0",
+        "remark-validate-links": "^7.0.0",
         "rollup-plugin-babel": "^3.0.7",
         "rollup-plugin-commonjs": "^9.1.3",
         "rollup-plugin-node-resolve": "^3.3.0",