Bump karma from 6.2.0 to 6.3.2 (#240)

Bumps [karma](https://github.com/karma-runner/karma) from 6.2.0 to 6.3.2.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v6.2.0...v6.3.2)

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