Update dependency eslint to v5.12.1 (#406)

Author: renovate[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "chalk": "2.4.2",
     "chromedriver": "2.45.0",
     "del": "3.0.0",
-    "eslint": "5.12.0",
+    "eslint": "5.12.1",
     "eslint-config-airbnb": "16.1.0",
     "eslint-plugin-import": "2.14.0",
     "geckodriver": "1.14.1",