chore(package): update eslint to version 3.0.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -34,7 +34,7 @@
     "babel-core": "^6.9.1",
     "babel-plugin-espower": "^2.2.0",
     "babel-preset-es2015": "^6.9.0",
-    "eslint": "^2.12.0",
+    "eslint": "^3.0.0",
     "eslint-config-airbnb": "^9.0.1",
     "eslint-plugin-import": "^1.8.1",
     "mocha": "^2.5.3",