chore(package): update react-scripts to version 3.4.1

Closes #783

Author: greenkeeper[bot]

packages/admin-ui/package.json

@@ -76,7 +76,7 @@
     "nightwatch": "^1.0.16",
     "prettier": "^1.11.1",
     "react-axe": "^3.0.1",
-    "react-scripts": "3.0.1",
+    "react-scripts": "3.4.1",
     "react-test-renderer": "^16.6.3",
     "redux-saga-test-plan": "^3.6.0",
     "storybook": "^1.0.0",