chore(package): update eslint to version 6.7.1

Closes #523

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "css-loader": "0.28.7",
     "enzyme": "^3.2.0",
     "enzyme-adapter-react-16": "^1.1.0",
-    "eslint": "4.13.1",
+    "eslint": "6.7.1",
     "eslint-plugin-react": "7.5.1",
     "faker": "^4.1.0",
     "file-loader": "1.1.5",