Bump minimist and mocha in /powershell

Removes [minimist](https://github.com/minimistjs/minimist). It's no longer used after updating ancestor dependency [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Removes `minimist`

Updates `mocha` from 5.2.0 to 10.1.0
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v5.2.0...v10.1.0)

---
updated-dependencies:
- dependency-name: minimist
  dependency-type: indirect
- dependency-name: mocha
  dependency-type: direct:development
...

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