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

Closes #226

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "enzyme": "3.3.0",
     "enzyme-adapter-react-16": "1.1.1",
     "eslint": "3.12.2",
-    "eslint-config-airbnb": "13.0.0",
+    "eslint-config-airbnb": "18.1.0",
     "eslint-plugin-import": "2.2.0",
     "eslint-plugin-jsx-a11y": "2.2.3",
     "eslint-plugin-react": "6.8.0",