Upgrade to Laravel 9 (#4413)

Co-authored-by: DaneEveritt <dane@daneeveritt.com>

app/Contracts/Extensions/HashidsInterface.php

@@ -1,11 +1,4 @@
 <?php
-/**
- * Pterodactyl - Panel
- * Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com>.
- *
- * This software is licensed under the terms of the MIT license.
- * https://opensource.org/licenses/MIT
- */
 
 namespace Pterodactyl\Contracts\Extensions;
 
@@ -16,12 +9,7 @@ interface HashidsInterface extends VendorHashidsInterface
     /**
      * Decode an encoded hashid and return the first result.
      *
-     * @param string $encoded
-     * @param null $default
-     *
-     * @return mixed
-     *
      * @throws \InvalidArgumentException
      */
-    public function decodeFirst($encoded, $default = null);
+    public function decodeFirst(string $encoded, string $default = null): mixed;
 }