Bump karma from 6.3.17 to 6.3.18 in /front

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.17 to 6.3.18. - [Release notes](https://github.com/karma-runner/karma/releases) - [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md) - [Commits](karma-runner/karma@v6.3.17...v6.3.18) --- updated-dependencies: - dependency-name: karma dependency-type: direct:development update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]