chore(package): update eslint to version 3.6.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -75,7 +75,7 @@
     "babel-preset-min": "^0.1.15",
     "babel-register": "^6.11.6",
     "coveralls": "^2.11.12",
-    "eslint": "^3.2.2",
+    "eslint": "^3.6.0",
     "eslint-config-xo": "^0.15.3",
     "eslint-formatter-pretty": "^1.0.0",
     "eslint-plugin-ava": "^3.0.0",