Bump firebase_core, cloud_firestore and firebase_auth (#1485)

Bumps [firebase_core](https://github.com/firebase/flutterfire/tree/master/packages/firebase_core), [cloud_firestore](https://github.com/firebase/flutterfire/tree/master/packages/cloud_firestore) and [firebase_auth](https://github.com/firebase/flutterfire/tree/master/packages/firebase_auth). These dependencies needed to be updated together.

Updates `firebase_core` from 1.24.0 to 2.0.0
- [Release notes](https://github.com/firebase/flutterfire/releases)
- [Changelog](https://github.com/firebase/flutterfire/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/flutterfire/commits/firebase_core_web-v2.0.0/packages/firebase_core)

Updates `cloud_firestore` from 3.5.1 to 4.0.1
- [Release notes](https://github.com/firebase/flutterfire/releases)
- [Changelog](https://github.com/firebase/flutterfire/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/flutterfire/commits/cloud_firestore-v4.0.1/packages/cloud_firestore)

Updates `firebase_auth` from 3.11.2 to 4.0.1
- [Release notes](https://github.com/firebase/flutterfire/releases)
- [Changelog](https://github.com/firebase/flutterfire/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/flutterfire/commits/firebase_auth-v4.0.1/packages/firebase_auth)

---
updated-dependencies:
- dependency-name: firebase_core
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: cloud_firestore
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: firebase_auth
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

experimental/web_dashboard/pubspec.yaml

@@ -8,11 +8,11 @@ environment:
 
 dependencies:
   charts_flutter: ^0.12.0
-  cloud_firestore: ^3.1.14
+  cloud_firestore: ^4.0.1
   collection: ^1.16.0
   cupertino_icons: ^1.0.0
-  firebase_auth: ^3.3.17
-  firebase_core: ^1.16.0
+  firebase_auth: ^4.0.1
+  firebase_core: ^2.0.0
   flutter:
     sdk: flutter
   google_sign_in: ^5.3.1