⬆️ Upgrade firebase packages

Author: mraerino

functions/package.json

@@ -2,8 +2,8 @@
   "name": "politics",
   "description": "Festify voting worker",
   "dependencies": {
-    "firebase-admin": "^6.1.0",
-    "firebase-functions": "^2.1.0",
+    "firebase-admin": "^7.3.0",
+    "firebase-functions": "^2.3.0",
     "lodash": "^4.17.5",
     "quick-lru": "^1.1.0",
     "request": "^2.88.0",
@@ -13,6 +13,7 @@
   "main": "./dist/index.js",
   "private": true,
   "devDependencies": {
+    "@firebase/app-types": "^0.3.9",
     "@types/express": "^4.11.1",
     "@types/node": "^8.9.1",
     "@types/quick-lru": "^1.1.0",