chore(package): update eslint-config-airbnb to version 18.0.0

Closes #773

Author: greenkeeper[bot]

packages/admin-ui/package.json

@@ -66,7 +66,7 @@
     "enzyme": "^3.3.0",
     "enzyme-adapter-react-16": "^1.1.1",
     "eslint": "5.16.0",
-    "eslint-config-airbnb": "17.1.0",
+    "eslint-config-airbnb": "18.0.0",
     "eslint-config-prettier": "^3.1.0",
     "eslint-plugin-import": "^2.7.0",
     "eslint-plugin-jsx-a11y": "^6.1.0",