[chore] Release 4.4.0 (#430)

Author: hiranya911

firebase.go

@@ -38,7 +38,7 @@ import (
 var defaultAuthOverrides = make(map[string]interface{})
 
 // Version of the Firebase Go Admin SDK.
-const Version = "4.3.0"
+const Version = "4.4.0"
 
 // firebaseEnvName is the name of the environment variable with the Config.
 const firebaseEnvName = "FIREBASE_CONFIG"