Upgrade: update eslint to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -43,7 +43,7 @@
     "commitizen": "^3.1.1",
     "conventional-changelog-eslint": "^3.0.1",
     "cz-adapter-eslint": "^0.2.0",
-    "eslint": "^5.16.0",
+    "eslint": "^6.0.0",
     "eslint-config-prettier": "^4.3.0",
     "eslint-plugin-prettier": "^3.1.0",
     "eslint-plugin-react": "^7.13.0",