Merge pull request #190 from package-wizard/code-style-cj7kr2r

The code style has been fixed

Author: andrey-helldar

app/Data/Casts/PlaceholderCast.php

@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace PackageWizard\Installer\Data\Casts;
 
 use Spatie\LaravelData\Casts\Cast;