fix(package): update eslint-config-airbnb to version 18.1.0

Closes #3

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
   "dependencies": {
     "babel-eslint": "^7.1.1",
     "eslint": "^3.17.1",
-    "eslint-config-airbnb": "^14.1.0",
+    "eslint-config-airbnb": "^18.1.0",
     "eslint-plugin-import": "^2.2.0"
   }
 }