Bump @nextcloud/event-bus from 1.1.4 to 1.2.0

Bumps [@nextcloud/event-bus](https://github.com/nextcloud/nextcloud-event-bus) from 1.1.4 to 1.2.0.
- [Release notes](https://github.com/nextcloud/nextcloud-event-bus/releases)
- [Changelog](https://github.com/nextcloud/nextcloud-event-bus/blob/master/CHANGELOG.md)
- [Commits](nextcloud-libraries/nextcloud-event-bus@v1.1.4...v1.2.0)

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