Merge branch 'develop' into css-variables

# Conflicts:
#	.eslintrc
#	demo/dist/demo.css
#	demo/dist/demo.js
#	demo/dist/demo.min.js
#	demo/dist/demo.min.js.map
#	dist/plyr.css
#	dist/plyr.js
#	dist/plyr.min.js
#	dist/plyr.min.js.map
#	dist/plyr.min.mjs
#	dist/plyr.min.mjs.map
#	dist/plyr.mjs
#	dist/plyr.polyfilled.js
#	dist/plyr.polyfilled.min.js
#	dist/plyr.polyfilled.min.js.map
#	dist/plyr.polyfilled.min.mjs
#	dist/plyr.polyfilled.min.mjs.map
#	dist/plyr.polyfilled.mjs
#	gulpfile.js
#	package.json

.eslintrc

@@ -1,35 +0,0 @@
-{
-    "parser": "babel-eslint",
-    "extends": ["airbnb-base", "prettier"],
-    "env": {
-        "browser": true,
-        "es6": true
-    },
-    "globals": {
-        "Plyr": false,
-        "jQuery": false
-    },
-    "rules": {
-        "import/no-cycle": 1,
-        "no-const-assign": 1,
-        "no-shadow": 0,
-        "no-this-before-super": 1,
-        "no-undef": 1,
-        "no-unreachable": 1,
-        "no-unused-vars": 1,
-        "constructor-super": 1,
-        "valid-typeof": 1,
-        "indent": [2, 4, { "SwitchCase": 1 }],
-        "quotes": [2, "single", "avoid-escape"],
-        "semi": [2, "always"],
-        "eqeqeq": [2, "always"],
-        "one-var": [2, "never"],
-        "comma-dangle": [2, "always-multiline"],
-        "spaced-comment": [2, "always"],
-        "no-restricted-globals": 2,
-        "no-param-reassign": [2, { "props": false }]
-    },
-    "parserOptions": {
-        "sourceType": "module"
-    }
-}