Update eslint to the latest version 🚀 (#1359)

* chore(package): update eslint to version 6.6.0

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

Author: greenkeeper[bot]

package-lock.json

@@ -83,7 +83,7 @@
     "core-js": "3.3.2",
     "cross-env": "6.0.3",
     "css-loader": "3.2.0",
-    "eslint": "6.5.1",
+    "eslint": "6.6.0",
     "eslint-plugin-jest": "22.19.0",
     "eslint-plugin-react": "7.16.0",
     "file-loader": "4.2.0",