Bump ms and karma in /editor

Bumps [ms](https://github.com/vercel/ms) to 2.0.0 and updates ancestor dependency [karma](https://github.com/karma-runner/karma). These dependencies need to be updated together.


Updates `ms` from 0.7.1 to 2.0.0
- [Release notes](https://github.com/vercel/ms/releases)
- [Commits](vercel/ms@0.7.1...2.0.0)

Updates `karma` from 1.7.1 to 6.4.1
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@1.7.1...v6.4.1)

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

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