chore(package): update eslint-config-airbnb to version 18.0.1

Closes #564

Author: greenkeeper[bot]

package.json

@@ -143,7 +143,7 @@
     "cross-env": "^5.1.1",
     "css-loader": "^1.0.0",
     "eslint": "^5.2.0",
-    "eslint-config-airbnb": "^17.0.0",
+    "eslint-config-airbnb": "^18.0.1",
     "eslint-loader": "^2.0.0",
     "eslint-plugin-import": "^2.17.1",
     "eslint-plugin-jsx-a11y": "^6.0.3",