Bump react-scripts from 3.1.1 to 3.4.0

Bumps [react-scripts](https://github.com/facebook/create-react-app/tree/HEAD/packages/react-scripts) from 3.1.1 to 3.4.0.
- [Release notes](https://github.com/facebook/create-react-app/releases)
- [Changelog](https://github.com/facebook/create-react-app/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/create-react-app/commits/react-scripts@3.4.0/packages/react-scripts)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "react": "^16.9.0",
     "react-dom": "^16.9.0",
-    "react-scripts": "3.1.1"
+    "react-scripts": "3.4.0"
   },
   "scripts": {
     "start": "react-scripts start",