* Add and handle MockCloudEvents for RTDB-V2

This commit is a follow-up to firebase-function's addition of rtdb-v2, firebase/firebase-functions#1127.

Wrap can now handle:

* `database.onValueCreated`
* `database.onValueDeleted`
* `database.onValueUpdated`
* `database.onValueWritten`

This commit updates the test sdk api for the Database CloudEventPartial
to support end-users submitting JSON that gets transformed into `DataSnapshot`
instead of forcing users to import and use `Change` and `DataSnapshot` to
mock out the CloudEvent resopnses.

Co-authored-by: Daniel Lee <danielylee@google.com>

Bumps [glob-parent](https://github.com/gulpjs/glob-parent) from 5.1.1 to 5.1.2.
- [Release notes](https://github.com/gulpjs/glob-parent/releases)
- [Changelog](https://github.com/gulpjs/glob-parent/blob/main/CHANGELOG.md)
- [Commits](gulpjs/glob-parent@v5.1.1...v5.1.2)

---
updated-dependencies:
- dependency-name: glob-parent
  dependency-type: indirect
...

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

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