Bump ws and karma

Bumps [ws](https://github.com/websockets/ws) to 7.5.10 and updates ancestor dependency [karma](https://github.com/karma-runner/karma). These dependencies need to be updated together.


Updates `ws` from 7.2.3 to 7.5.10
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.2.3...7.5.10)

Updates `karma` from 4.4.1 to 6.4.3
- [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...v6.4.3)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: indirect
- dependency-name: karma
  dependency-type: direct:development
...

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