chore(deps): bump firebase from 7.9.1 to 7.9.3

Bumps [firebase](https://github.com/firebase/firebase-js-sdk) from 7.9.1 to 7.9.3.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Commits](https://github.com/firebase/firebase-js-sdk/compare/firebase@7.9.1...firebase@7.9.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -38,7 +38,7 @@
     "@nuxtjs/sitemap": "^2.0.1",
     "@nuxtjs/toast": "^3.3.0",
     "ace-builds": "^1.4.8",
-    "firebase": "^7.9.1",
+    "firebase": "^7.9.3",
     "graphql": "^14.6.0",
     "graphql-language-service-interface": "^2.3.3",
     "nuxt": "^2.11.0",