Update eslint to the latest version 🚀 (#6160)

* chore(package): update eslint to version 6.6.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -73,7 +73,7 @@
     "bcrypt-nodejs": "0.0.3",
     "cross-env": "6.0.3",
     "deep-diff": "1.0.2",
-    "eslint": "6.5.1",
+    "eslint": "6.6.0",
     "eslint-plugin-flowtype": "4.3.0",
     "flow-bin": "0.110.1",
     "form-data": "2.5.1",