Laravel 9 Update (#1413)

Update to Laravel 9 and PHP 8+

Co-authored-by: B.Fatih KOZ <fatih.koz@gmail.com>

app/Models/Enums/PirepSource.php

@@ -9,7 +9,7 @@ class PirepSource extends Enum
     public const MANUAL = 0;
     public const ACARS = 1;
 
-    protected static $labels = [
+    protected static array $labels = [
         self::MANUAL => 'pireps.source_types.manual',
         self::ACARS  => 'pireps.source_types.acars',
     ];