Bump karma-electron from 6.3.3 to 6.3.4 in /web

Bumps [karma-electron](https://github.com/twolfson/karma-electron) from 6.3.3 to 6.3.4.
- [Release notes](https://github.com/twolfson/karma-electron/releases)
- [Changelog](https://github.com/twolfson/karma-electron/blob/master/CHANGELOG.md)
- [Commits](twolfson/karma-electron@6.3.3...6.3.4)

---
updated-dependencies:
- dependency-name: karma-electron
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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