fix(deps): update dependency @google-cloud/connect-firestore to v3

Author: renovate-bot

sessions/package.json

@@ -10,7 +10,7 @@
   "author": "Google Inc.",
   "license": "Apache-2.0",
   "dependencies": {
-    "@google-cloud/connect-firestore": "^2.0.0",
+    "@google-cloud/connect-firestore": "^3.0.0",
     "@google-cloud/firestore": "^5.0.0",
     "express": "^4.17.1",
     "express-session": "^1.16.2"