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

Closes #1283

Author: greenkeeper[bot]

package.json

@@ -58,7 +58,7 @@
     "enzyme": "^3.10.0",
     "enzyme-adapter-react-16": "^1.14.0",
     "enzyme-to-json": "^3.3.5",
-    "eslint-config-airbnb": "^17.1.1",
+    "eslint-config-airbnb": "^18.1.0",
     "eslint-plugin-import": "^2.18.2",
     "eslint-plugin-jsx-a11y": "^6.2.2",
     "eslint-plugin-react": "^7.14.3",