chore(package): update eslint to version 3.12.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -68,7 +68,7 @@
     "coveralls": "^2.11.6",
     "cz-conventional-changelog": "1.2.0",
     "del": "^2.2.0",
-    "eslint": "3.11.1",
+    "eslint": "3.12.0",
     "eslint-config-airbnb-base": "7.1.0",
     "eslint-plugin-import": "1.16.0",
     "eslint-watch": "2.1.14",