Bump debug and mocha

Bumps [debug](https://github.com/debug-js/debug) to 4.3.1 and updates ancestor dependencies [debug](https://github.com/debug-js/debug) and [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `debug` from 4.1.1 to 4.3.1
- [Release notes](https://github.com/debug-js/debug/releases)
- [Commits](debug-js/debug@4.1.1...4.3.1)

Updates `debug` from 4.2.0 to 4.3.1
- [Release notes](https://github.com/debug-js/debug/releases)
- [Commits](debug-js/debug@4.1.1...4.3.1)

Updates `debug` from 3.2.6 to 4.3.1
- [Release notes](https://github.com/debug-js/debug/releases)
- [Commits](debug-js/debug@4.1.1...4.3.1)

Updates `mocha` from 8.1.3 to 8.4.0
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v8.1.3...v8.4.0)

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

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