chore(package): update eslint to version 4.11.0

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "grunt-parts": "^0.5.6",
     "ajv": "^4.10.0",
     "codecov": "^1.0.1",
-    "eslint": "^3.12.0",
+    "eslint": "^4.11.0",
     "eslint-config-airbnb-base": "^10.0.1",
     "eslint-plugin-import": "^2.2.0",
     "is-my-json-valid": "^2.12.2",