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

Closes #152

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "babel-preset-jest": "^23.2.0",
     "differencify-jest-reporter": "0.0.1",
     "eslint": "^6.0.0",
-    "eslint-config-airbnb": "^17.1.0",
+    "eslint-config-airbnb": "^18.1.0",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jsx-a11y": "^6.1.1",
     "eslint-plugin-prefer-object-spread": "^1.2.1",