fix: upgrade @firebase/app from 0.8.4 to 0.9.3

Snyk has created this PR to upgrade @firebase/app from 0.8.4 to 0.9.3.

See this package in npm:
https://www.npmjs.com/package/@firebase/app

See this project in Snyk:
https://app.snyk.io/org/luarrekcah/project/11ecb6a1-5d96-4f54-b765-ab021626c07f?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -10,7 +10,7 @@
     "deployDelete": "node deploy/delete.js"
   },
   "dependencies": {
-    "@firebase/app": "^0.8.4",
+    "@firebase/app": "^0.9.3",
     "@firebase/database": "^0.13.10",
     "axios": "^1.1.3",
     "canvas": "^2.11.0",