Bump node-fetch and firebase

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) to 2.6.7 and updates ancestor dependency [firebase](https://github.com/firebase/firebase-js-sdk). These dependencies need to be updated together.


Updates `node-fetch` from 2.6.1 to 2.6.7
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.1...v2.6.7)

Updates `firebase` from 7.24.0 to 9.15.0
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/compare/[email protected]@9.15.0)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: indirect
- dependency-name: firebase
  dependency-type: direct:production
...

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