chore(package): update eslint to version 5.0.0

Author: greenkeeper[bot]

package.json

@@ -64,7 +64,7 @@
     "codecov": "^3.0.0",
     "enzyme": "^3.1.0",
     "enzyme-adapter-react-16": "^1.0.4",
-    "eslint": "^4.1.0",
+    "eslint": "^5.0.0",
     "eslint-config-react-app": "^2.0.0",
     "eslint-plugin-flowtype": "^2.33.0",
     "eslint-plugin-import": "^2.2.0",