Update .eslintrc

To make it compatible with new versions of ESLint and specify other
options.

.eslintrc

@@ -1,5 +1,5 @@
 {
-  "env" : {
+  "env": {
     "node": true,
     "browser": true
   },
@@ -7,14 +7,34 @@
     "$": true,
     "define": true
   },
-  "rules" : {
+  "extends": "eslint:recommended",
-    "quotes": false,
+  "rules": {
-    "space-after-keywords": [2, "always", {"checkFunctionKeyword": true}],
+    "eqeqeq": 2,
+    "no-multi-spaces": 2,
+    "curly": 2,
+    "semi": 2,
+    "no-with": 2,
+    "strict": [2, "global"],
+    "radix": 2,
+    "no-use-before-define": 2,
+    "block-spacing": 2,
+    "brace-style": [2, "1tbs", {"allowSingleLine": true}],
+    "camelcase": 2,
+    "comma-spacing": [2, {"before": false, "after": true}],
+    "eol-last": 2,
+    "no-multiple-empty-lines": 2,
+    "indent": [2, 2],
+    "key-spacing": [2, {"beforeColon": false, "afterColon": true}],
+    "linebreak-style": [2, "unix"],
+    "new-parens": 2,
+    "no-trailing-spaces": 2,
+    "semi-spacing": 2,
     "space-before-blocks": [2, "always"],
-    "brace-style": [2, "1tbs", { "allowSingleLine": false}],
+    "space-before-function-paren": [2, {"anonymous": "always", "named": "never"}],
-    "spaced-line-comment": [2, "always"],
+    "space-in-parens": 2,
-    "radix": [2, "always"],
+    "space-infix-ops": 2,
-    "key-spacing": [2, "always", {"beforeColon": false, "afterColon": true}],
+    "space-return-throw-case": 2,
-    "no-multiple-empty-lines": [2, {max: 1}],
+    "space-unary-ops": 2,
+    "spaced-comment": 2
   }
 }