build(deps): bump @firebase/database-compat from 0.2.6 to 0.2.7

Bumps [@firebase/database-compat](https://github.com/firebase/firebase-js-sdk/tree/HEAD/packages/database-compat) from 0.2.6 to 0.2.7.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/packages/database-compat/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/commits/@firebase/[email protected]/packages/database-compat)

---
updated-dependencies:
- dependency-name: "@firebase/database-compat"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]