Bumped version to 3.5.0 (#204)

Author: hiranya911

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Unreleased
 
-- [added] `messaging.AndroidNotification`type now supports channel_id.
+# v3.5.0
+
+- [added] `messaging.AndroidNotification` type now supports `channel_id`.
 - [dropped] Dropped support for Go 1.8 and earlier.
 - [fixed] Fixing error handling in FCM. The SDK now checks the key 
   `type.googleapis.com/google.firebase.fcm.v1.FcmError` to set error code.

firebase.go

@@ -39,7 +39,7 @@ import (
 var defaultAuthOverrides = make(map[string]interface{})
 
 // Version of the Firebase Go Admin SDK.
-const Version = "3.4.0"
+const Version = "3.5.0"
 
 // firebaseEnvName is the name of the environment variable with the Config.
 const firebaseEnvName = "FIREBASE_CONFIG"