Bump formidable and supertest (#1917)

Bumps [formidable](https://github.com/node-formidable/formidable) to 3.5.1 and updates ancestor dependency [supertest](https://github.com/ladjs/supertest). These dependencies need to be updated together.


Updates `formidable` from 1.2.2 to 3.5.1
- [Release notes](https://github.com/node-formidable/formidable/releases)
- [Changelog](https://github.com/node-formidable/formidable/blob/master/CHANGELOG.md)
- [Commits](https://github.com/node-formidable/formidable/commits/v3.5.1)

Updates `supertest` from 6.1.5 to 7.0.0
- [Release notes](https://github.com/ladjs/supertest/releases)
- [Commits](ladjs/supertest@v6.1.5...v7.0.0)

---
updated-dependencies:
- dependency-name: formidable
  dependency-type: indirect
- dependency-name: supertest
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>