update .codeclimate.yml, .eslintrc

.codeclimate.yml

@@ -1,6 +1,10 @@
 engines:
   eslint:
     enabled: true
+    channel: "eslint-3"
+    config:
+      ignore_warnings: true
+      config: .eslintrc
   stylelint:
     enabled: true
   duplication:

.eslintrc

@@ -15,9 +15,8 @@
         "react/prefer-es6-class": [0],
         "react/prefer-stateless-function": [0],
         "react/forbid-prop-types": [0],
-        /* to allow importing 'gatsby-helpers' */
         "import/no-extraneous-dependencies": [0],
-        "comma-dangle": ["error", {"functions": "ignore"}],
+        "comma-dangle": ["error", "never"],
         "arrow-body-style": ["error", "as-needed", { "requireReturnForObjectLiteral": true }],
         "import/no-unresolved": [0],
         "import/extensions": [0],