Bump react-scripts from 3.2.0 to 5.0.1 in /frontend (#239)

Bumps [react-scripts](https://github.com/facebook/create-react-app/tree/HEAD/packages/react-scripts) from 3.2.0 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)

---
updated-dependencies:
- dependency-name: react-scripts
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: David J. M. Karlsen <david@davidkarlsen.com>

frontend/package.json

@@ -10,7 +10,7 @@
       "react": "^16.14.0",
       "react-dom": "^16.14.0",
       "react-redux": "^7.1.1",
-      "react-scripts": "3.2.0",
+      "react-scripts": "5.0.1",
       "redux-starter-kit": "^0.7.0",
       "styled-components": "^4.4.1"
     },