Bump merge and react-scripts

Removes [merge](https://github.com/yeikos/js.merge). It's no longer used after updating ancestor dependency [react-scripts](https://github.com/facebook/create-react-app/tree/HEAD/packages/react-scripts). These dependencies need to be updated together.


Removes `merge`

Updates `react-scripts` from 1.1.5 to 5.0.1
- [Release notes](https://github.com/facebook/create-react-app/releases)
- [Changelog](https://github.com/facebook/create-react-app/blob/main/CHANGELOG-1.x.md)
- [Commits](https://github.com/facebook/create-react-app/commits/react-scripts@5.0.1/packages/react-scripts)

---
updated-dependencies:
- dependency-name: merge
  dependency-type: indirect
- dependency-name: react-scripts
  dependency-type: direct:development
...

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