Bump grunt-karma from 4.0.0 to 4.0.2 (RobotWebTools#440)

Bumps [grunt-karma](https://github.com/karma-runner/grunt-karma) from 4.0.0 to 4.0.2.
- [Release notes](https://github.com/karma-runner/grunt-karma/releases)
- [Changelog](https://github.com/karma-runner/grunt-karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/grunt-karma@v4.0.0...v4.0.2)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>