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 7.5.6 to 7.5.10
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@7.5.6...7.5.10)

Updates `karma` from 3.1.4 to 6.4.4
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v3.1.4...v6.4.4)

---
updated-dependencies:
- dependency-name: ws
  dependency-version: 7.5.10
  dependency-type: indirect
- dependency-name: karma
  dependency-version: 6.4.4
  dependency-type: direct:development
...

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

Author: dependabot[bot]