(fix) update eslintrc

.eslintrc

@@ -3,7 +3,8 @@
   "env": {
     "browser": true,
     "node": true,
-    "mocha": true
+    "mocha": true,
+    "es6": true
   },
   "globals": {
     "expect": true,
@@ -157,11 +158,9 @@
       "before": false,
       "after": true
     }],
-    "space-after-keywords": 2,       // http://eslint.org/docs/rules/space-after-keywords
     "space-before-blocks": 2,        // http://eslint.org/docs/rules/space-before-blocks
     "space-before-function-paren": [2, "never"], // http://eslint.org/docs/rules/space-before-function-paren
     "space-infix-ops": 2,            // http://eslint.org/docs/rules/space-infix-ops
-    "space-return-throw-case": 2,    // http://eslint.org/docs/rules/space-return-throw-case
     "spaced-comment": [2, "always",  {// http://eslint.org/docs/rules/spaced-comment
       "exceptions": ["-", "+"],
       "markers": ["=", "!"]           // space here to support sprockets directives
@@ -175,7 +174,6 @@
     "react/jsx-sort-props": 0,
     "react/jsx-uses-react": 1,
     "react/jsx-uses-vars": 1,
-    "react/no-did-mount-set-state": [2, "allow-in-func"],
     "react/no-did-update-set-state": 2,
     "react/no-multi-comp": 2,
     "react/no-unknown-property": 2,