update tests to use new factories

app/Models/Subuser.php

@@ -3,6 +3,7 @@
 namespace Pterodactyl\Models;
 
 use Illuminate\Notifications\Notifiable;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 
 /**
  * @property int $id
@@ -17,6 +18,7 @@ use Illuminate\Notifications\Notifiable;
  */
 class Subuser extends Model
 {
+    use HasFactory;
     use Notifiable;
 
     /**