chore(deps-dev): bump firebase-functions-test in /functions

Bumps [firebase-functions-test](https://github.com/firebase/firebase-functions-test) from 3.0.0 to 3.4.0.
- [Release notes](https://github.com/firebase/firebase-functions-test/releases)
- [Changelog](https://github.com/firebase/firebase-functions-test/blob/master/tsconfig.release.json)
- [Commits](firebase/firebase-functions-test@v3.0.0...v3.4.0)

---
updated-dependencies:
- dependency-name: firebase-functions-test
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

functions/package.json

@@ -39,7 +39,7 @@
 	"devDependencies": {
 		"eslint": "^8.54.0",
 		"eslint-config-google": "^0.14.0",
-		"firebase-functions-test": "^3.0.0"
+		"firebase-functions-test": "^3.4.0"
 	},
 	"private": true
 }