upgrades core to 8.4.2

core/.eslintrc.json

@@ -1,5 +1,6 @@
 {
-  "extends": "eslint:recommended",
+  "extends": "eslint-config-airbnb",
+  "root": true,
   "env": {
     "browser": true,
     "es6": true,
@@ -18,80 +19,23 @@
     "CKEDITOR": true
   },
   "rules": {
-    // Errors.
-    "array-bracket-spacing": [2, "never"],
-    "block-scoped-var": 2,
-    "brace-style": [2, "stroustrup", {"allowSingleLine": true}],
-    "comma-dangle": [2, "never"],
-    "comma-spacing": 2,
-    "comma-style": [2, "last"],
-    "computed-property-spacing": [2, "never"],
-    "curly": [2, "all"],
-    "eol-last": 2,
-    "eqeqeq": [2, "smart"],
-    "guard-for-in": 2,
-    "indent": [2, 2, {"SwitchCase": 1}],
-    "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
-    "keyword-spacing": [2, {"before": true, "after": true}],
-    "linebreak-style": [2, "unix"],
-    "lines-around-comment": [2, {"beforeBlockComment": true, "afterBlockComment": false}],
-    "new-parens": 2,
-    "no-array-constructor": 2,
-    "no-caller": 2,
-    "no-catch-shadow": 2,
-    "no-eval": 2,
-    "no-extend-native": 2,
-    "no-extra-bind": 2,
-    "no-extra-parens": [2, "functions"],
-    "no-implied-eval": 2,
-    "no-iterator": 2,
-    "no-label-var": 2,
-    "no-labels": 2,
-    "no-lone-blocks": 2,
-    "no-loop-func": 2,
-    "no-multi-spaces": 2,
-    "no-multi-str": 2,
-    "no-native-reassign": 2,
-    "no-nested-ternary": 2,
-    "no-new-func": 2,
-    "no-new-object": 2,
-    "no-new-wrappers": 2,
-    "no-octal-escape": 2,
-    "no-process-exit": 2,
-    "no-proto": 2,
-    "no-return-assign": 2,
-    "no-script-url": 2,
-    "no-sequences": 2,
-    "no-shadow-restricted-names": 2,
-    "no-spaced-func": 2,
-    "no-trailing-spaces": 2,
-    "no-undef-init": 2,
-    "no-undefined": 2,
-    "no-unused-expressions": 2,
-    "no-unused-vars": [2, {"vars": "all", "args": "none"}],
-    "no-with": 2,
-    "object-curly-spacing": [2, "never"],
-    "one-var": [2, "never"],
-    "quote-props": [2, "consistent-as-needed"],
-    "quotes": [2, "single", "avoid-escape"],
-    "semi": [2, "always"],
-    "semi-spacing": [2, {"before": false, "after": true}],
-    "space-before-blocks": [2, "always"],
-    "space-before-function-paren": [2, {"anonymous": "always", "named": "never"}],
-    "space-in-parens": [2, "never"],
-    "space-infix-ops": 2,
-    "space-unary-ops": [2, { "words": true, "nonwords": false }],
-    "spaced-comment": [2, "always"],
-    "strict": [2, "function"],
-    "yoda": [2, "never"],
-    // Warnings.
+    "consistent-return": [0],
+    "no-underscore-dangle": [0],
     "max-nested-callbacks": [1, 3],
+    "no-mutable-exports": [1],
+    "no-plusplus": [1, {
+      "allowForLoopAfterthoughts": true
+    }],
+    "no-param-reassign": [0],
+    "no-prototype-builtins": [0],
     "valid-jsdoc": [1, {
       "prefer": {
         "returns": "return",
         "property": "prop"
       },
       "requireReturn": false
-    }]
+    }],
+    "brace-style": ["error", "stroustrup"],
+    "no-unused-vars": [1]
   }
 }