Bump firebase from 7.17.2 to 7.18.0

Bumps [firebase](https://github.com/firebase/firebase-js-sdk) from 7.17.2 to 7.18.0.
- [Release notes](https://github.com/firebase/firebase-js-sdk/releases)
- [Commits](https://github.com/firebase/firebase-js-sdk/compare/firebase@7.17.2...firebase@7.18.0)

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

package.json

@@ -36,7 +36,7 @@
     "@nuxtjs/sitemap": "^2.4.0",
     "@nuxtjs/toast": "^3.3.1",
     "ace-builds": "^1.4.12",
-    "firebase": "^7.17.2",
+    "firebase": "^7.18.0",
     "esprima": "^4.0.1",
     "graphql": "^15.3.0",
     "graphql-language-service-interface": "^2.4.1",