Fix Node 4 e2e tests (facebook#1730)

Author: Timer

packages/react-scripts/package.json

@@ -40,7 +40,7 @@
     "detect-port": "1.0.1",
     "dotenv": "2.0.0",
     "eslint": "3.16.1",
-    "eslint-config-react-app": "^0.5.2",
+    "eslint-config-react-app": "^0.6.0",
     "eslint-loader": "1.6.0",
     "eslint-plugin-flowtype": "2.21.0",
     "eslint-plugin-import": "2.0.1",