Bump google-auth from 2.29.0 to 2.31.0 in /firebase_push_notifications (

#731)

Bumps [google-auth](https://github.com/googleapis/google-auth-library-python) from 2.29.0 to 2.31.0.
- [Release notes](https://github.com/googleapis/google-auth-library-python/releases)
- [Changelog](https://github.com/googleapis/google-auth-library-python/blob/main/CHANGELOG.md)
- [Commits](googleapis/google-auth-library-python@v2.29.0...v2.31.0)

---
updated-dependencies:
- dependency-name: google-auth
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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firebase_push_notifications/pyproject.toml

@@ -11,7 +11,7 @@ python = "^3.9"
 # explicitly installed with the plugin if desired.
 aries-cloudagent = { version = ">=0.10.3, < 1.0.0", optional = true }
 marshmallow = "^3.20.1"
-google-auth = "^2.25.2"
+google-auth = "^2.31.0"
 google-api-python-client = "^2.134.0"
 requests = "^2.31.0"