Bump minimist, mkdirp, karma, karma-mocha and mocha

Bumps [minimist](https://github.com/minimistjs/minimist) to 1.2.8 and updates ancestor dependencies [minimist](https://github.com/minimistjs/minimist), [mkdirp](https://github.com/isaacs/node-mkdirp), [karma](https://github.com/karma-runner/karma), [karma-mocha](https://github.com/karma-runner/karma-mocha) and [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `minimist` from 1.2.5 to 1.2.8
- [Changelog](https://github.com/minimistjs/minimist/blob/main/CHANGELOG.md)
- [Commits](minimistjs/minimist@v1.2.5...v1.2.8)

Updates `mkdirp` from 0.5.1 to 0.5.4
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-mkdirp@0.5.1...v0.5.4)

Updates `karma` from 4.4.1 to 6.4.2
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v4.4.1...v6.4.2)

Updates `karma-mocha` from 1.3.0 to 2.0.1
- [Release notes](https://github.com/karma-runner/karma-mocha/releases)
- [Changelog](https://github.com/karma-runner/karma-mocha/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma-mocha@v1.3.0...v2.0.1)

Updates `mocha` from 6.2.2 to 6.2.3
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v6.2.2...v6.2.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]