Bump @nextcloud/event-bus from 1.2.0 to 2.0.0

Bumps [@nextcloud/event-bus](https://github.com/nextcloud/nextcloud-event-bus) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/nextcloud/nextcloud-event-bus/releases)
- [Changelog](https://github.com/nextcloud/nextcloud-event-bus/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nextcloud/nextcloud-event-bus/compare/v1.2.0...v2.0.0

)

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