fix(deps): update dependency firebase-functions to v3

Author: renovate-bot

functions/dialogflow/functions/package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "firebase-admin": "^8.0.0",
-    "firebase-functions": "^2.2.0"
+    "firebase-functions": "^3.0.0"
   },
   "devDependencies": {
     "@google-cloud/functions-emulator": "^1.0.0-beta.5",

functions/speech-to-speech/functions/package.json

@@ -42,7 +42,7 @@
     "@google-cloud/translate": "^3.0.0",
     "uuid": "^3.3.2",
     "firebase-admin": "^8.0.0",
-    "firebase-functions": "^2.1.0"
+    "firebase-functions": "^3.0.0"
   },
   "devDependencies": {
     "@google-cloud/functions-emulator": "^1.0.0-beta.5",