Build(deps-dev): Bump @firebase/rules-unit-testing from 2.0.7 to 3.0.0 (

#584)

Bumps [@firebase/rules-unit-testing](https://github.com/firebase/firebase-js-sdk/tree/HEAD/packages/rules-unit-testing) from 2.0.7 to 3.0.0.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/packages/rules-unit-testing/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/commits/@firebase/rules-unit-testing@3.0.0/packages/rules-unit-testing)

---
updated-dependencies:
- dependency-name: "@firebase/rules-unit-testing"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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