Firebase-admin

- The Admin SDK can now read the Firebase/Google Cloud Platform project ID from both `GCLOUD_PROJECT` and `GOOGLE_CLOUD_PROJECT` environment variables.

Authentication

- The Admin SDK can now create custom tokens without being initialized with service account credentials.
- The SDK now provides a [`ServiceAccountId`](https://godoc.org/firebase.google.com/go#Config)
option specifier, which can be used to set just the client email of a service account.
- When deployed in an environment managed by Google (e.g. Google App Engine), the SDK can auto discover a service account ID without any explicit configuration.
- The Admin SDK now uses a regular unauthorized HTTP client to fetch public keys when verifying ID tokens. Developers who use `VerifyIDToken()` function are highly recommended to upgrade to this version, so this change will take effect. The underlying Google API that issues public keys will soon stop responding to authorized HTTP requests.

New Features

* feat(fcm): Add `DirectBootOk` field to `AndroidConfig` (431)

Miscellaneous

* [chore] Release 3.1.0 (432)
* chore: Add `X-Goog-Api-Client` metric header to outgoing requests (430)
* chore(deps): bump System.Security.Cryptography.Xml in /FirebaseAdmin (429)
* chore(deps): bump System.Text.Json (428)
* chore(deps): bump System.Text.Json (427)
* chore(deps): bump Microsoft.NET.Test.Sdk in /FirebaseAdmin (422)
* chore(deps): bump actions/download-artifact from 4.1.7 to 4.1.8 (423)

Bug Fixes

* fix(fcm): Use Invariant Culture when generating event_time (417)

Miscellaneous

* [chore] Release 3.0.1 (420)
* chore: Upgrade `actions/upload-artifact` (421)
* chore(deps): bump xunit.runner.visualstudio in /FirebaseAdmin (413)
* chore(deps): bump System.Security.Cryptography.Xml in /FirebaseAdmin (415)
* chore(deps): bump System.Collections.Immutable in /FirebaseAdmin (416)
* chore(deps): bump actions/download-artifact in /.github/workflows (418)
* chore(deps): bump System.Text.Json (412)
* chore(deps): bump System.Text.Json (411)
* chore: update integration test resources (410)
* chore(deps): bump Google.Apis.Auth in /FirebaseAdmin (403)
* chore(deps): bump coverlet.msbuild from 2.9.0 to 6.0.2 in /FirebaseAdmin (402)
* chore(deps): bump xunit.runner.visualstudio in /FirebaseAdmin (405)
* chore(deps): bump Microsoft.NET.Test.Sdk in /FirebaseAdmin (407)

Breaking Changes

* change: Update Target Frameworks and Dependancies (390)

Miscellaneous

* [chore] Release 3.0.0 Take 2 (400)
* Revert "[chore] Release 3.0.0 (397)" (398)
* Revert "(chore): Bump `upload-artifact` and `download-artifact` to v4 (395)" (399)
* [chore] Release 3.0.0 (397)
* (chore): Bump `upload-artifact` and `download-artifact` to v4 (395)
* chore: fix dependabot .NET path (394)
* chore: Enabled dependabot (391)

* The `auth` and `messaging` packages now provide a set of new functions for checking various error conditions (e.g. `auth.IsIDTokenRevoked()`, `messaging.IsInvalidArgument()` etc).

Cloud Messaging

* Added the `MutableContent` field to the [`messaging.Aps`](https://godoc.org/firebase.google.com/go/messaging#Aps) type. This can be used to set the `mutable-content` property when sending FCM messages to APNs targets.
* Added support for specifying arbitrary key-value fields in the `Aps` type.
* Improved error handling in the [`messaging`](https://godoc.org/firebase.google.com/go/messaging) API. The returned errors now contain additional details.

Version support

- [added] Added support for Go 1.6.

FCM

- [changed] Fixed a bug in the [`UnsubscribeFromTopic()`](https://godoc.org/firebase.google.com/go/messaging#Client.UnsubscribeFromTopic) function.

Auth

- [changed] Improved the error message returned by `GetUser()`,
`GetUserByEmail()` and `GetUserByPhoneNumber()` APIs in [`auth`](https://godoc.org/firebase.google.com/go/auth) package.