build(deps-dev): bump @firebase/app-compat from 0.1.25 to 0.1.26

Bumps [@firebase/app-compat](https://github.com/firebase/firebase-js-sdk/tree/HEAD/packages/app-compat) from 0.1.25 to 0.1.26.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Changelog](https://github.com/firebase/firebase-js-sdk/blob/master/packages/app-compat/CHANGELOG.md)
- [Commits](https://github.com/firebase/firebase-js-sdk/commits/@firebase/[email protected]/packages/app-compat)

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

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

Author: dependabot[bot]