Bump cross-spawn, react-scripts and serve in /frontend

Bumps [cross-spawn](https://github.com/moxystudio/node-cross-spawn) to 7.0.6 and updates ancestor dependencies [cross-spawn](https://github.com/moxystudio/node-cross-spawn), [react-scripts](https://github.com/facebook/create-react-app/tree/HEAD/packages/react-scripts) and [serve](https://github.com/vercel/serve). These dependencies need to be updated together.


Updates `cross-spawn` from 7.0.1 to 7.0.6
- [Changelog](https://github.com/moxystudio/node-cross-spawn/blob/master/CHANGELOG.md)
- [Commits](moxystudio/node-cross-spawn@v7.0.1...v7.0.6)

Updates `react-scripts` from 3.4.3 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-3.x.md)
- [Commits](https://github.com/facebook/create-react-app/commits/react-scripts@5.0.1/packages/react-scripts)

Updates `serve` from 11.3.2 to 14.2.4
- [Release notes](https://github.com/vercel/serve/releases)
- [Commits](vercel/serve@11.3.2...14.2.4)

---
updated-dependencies:
- dependency-name: cross-spawn
  dependency-type: indirect
- dependency-name: react-scripts
  dependency-type: direct:production
- dependency-name: serve
  dependency-type: direct:production
...

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