Bump ua-parser-js and karma

Bumps [ua-parser-js](https://github.com/faisalman/ua-parser-js) to 0.7.39 and updates ancestor dependency [karma](https://github.com/karma-runner/karma). These dependencies need to be updated together.


Updates `ua-parser-js` from 0.7.21 to 0.7.39
- [Release notes](https://github.com/faisalman/ua-parser-js/releases)
- [Changelog](https://github.com/faisalman/ua-parser-js/blob/master/CHANGELOG.md)
- [Commits](faisalman/ua-parser-js@0.7.21...0.7.39)

Updates `karma` from 5.0.9 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@v5.0.9...v6.4.4)

---
updated-dependencies:
- dependency-name: ua-parser-js
  dependency-type: indirect
- dependency-name: karma
  dependency-type: direct:development
...

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