chore(package): update eslint to version 3.1.1

Author: Hans Kristian Flaatten

package.json

@@ -39,9 +39,9 @@
   },
   "devDependencies": {
     "codacy-coverage": "^1.1.3",
-    "eslint": "^2.13.1",
-    "eslint-config-airbnb-base": "^3.0.1",
-    "eslint-plugin-import": "^1.10.0",
+    "eslint": "^3.1.1",
+    "eslint-config-airbnb-base": "^4.0.2",
+    "eslint-plugin-import": "^1.11.0",
     "greenkeeper-postpublish": "^1.0.0",
     "istanbul": "^0.4.4",
     "mocha": "^2.5.3",