fix(deps): update dependency firebase-admin to v12

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-admin (source)	^11.11.1 -> ^12.0.0

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Release Notes

firebase/firebase-admin-node (firebase-admin)

v12.0.0: Firebase Admin Node.js SDK v12.0.0

Compare Source

• Breaking change: Upgraded the @google-cloud/firestore package to v7. This is a breaking change. Refer to the Cloud Firestore release notes for more details.

• Breaking change: Upgraded the @google-cloud/storage package to v7. This is a breaking change. Refer to the Cloud Storage release notes for more details.

• Breaking change: Upgraded TypeScript to v5.1.6.

• Deprecated support for Node.js 14. Instead use Node.js 16 or higher when deploying the Admin SDK. Node.js 14 support will be dropped in the next major version.

• Upgraded the google-cloud/firestore dependency to v7.1.0 to support sum() and `average() aggregation functions.

• Upgraded the @firebase/database-compat package to v1.

• Dropped AutoML model support (#​1974)

Bug Fixes

• fix(firestore): Export new aggregate types (#​2396)

Miscellaneous

• [chore] Release 12.0.0 (#​2404)
• chore: Deprecate Node.js 14 (#​2397)
• build(deps): Bump typescript, database-compat (#​2403)
• build(deps-dev): bump @​types/firebase-token-generator (#​2399)
• build(deps-dev): bump sinon and @​types/sinon (#​2398)
• build(deps-dev): bump @​types/mocha from 10.0.1 to 10.0.6 (#​2400)
• build(deps-dev): bump @​types/minimist from 1.2.2 to 1.2.5 (#​2389)
• build(deps-dev): bump @​types/request from 2.48.8 to 2.48.12 (#​2390)
• chore(deps): bump google-cloud/firestore and google-cloud/storage

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