Update eslint 2.0.0 -> 3.11.1

Author: simonsmith

package.json

@@ -27,7 +27,7 @@
   },
   "devDependencies": {
     "ava": "^0.16.0",
-    "eslint": "^2.0.0",
+    "eslint": "^3.11.1",
     "eslint-config-postcss": "^2.0.0"
   },
   "files": [