Bump firebase-functions from 3.8.0 to 3.11.0 in /functions (#61)

Bumps [firebase-functions](https://github.com/firebase/firebase-functions) from 3.8.0 to 3.11.0.
- [Release notes](https://github.com/firebase/firebase-functions/releases)
- [Changelog](https://github.com/firebase/firebase-functions/blob/master/tsconfig.release.json)
- [Commits](firebase/firebase-functions@v3.8.0...v3.11.0)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

functions/package-lock.json

@@ -19,7 +19,7 @@
     "cors": "^2.8.5",
     "express": "^4.17.1",
     "firebase-admin": "^8.13.0",
-    "firebase-functions": "^3.8.0",
+    "firebase-functions": "^3.11.0",
     "unzipper": "^0.10.11"
   },
   "devDependencies": {