Update dependency eslint-config-airbnb to v18.1.0 (#560)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -43,7 +43,7 @@
     "coveralls": "3.0.9",
     "del": "5.1.0",
     "eslint": "6.8.0",
-    "eslint-config-airbnb": "18.0.1",
+    "eslint-config-airbnb": "18.1.0",
     "eslint-plugin-import": "2.20.1",
     "geckodriver": "1.19.1",
     "istanbul": "0.4.5",