Adding Ship Class column

app/Models/Ships.php

@@ -10,6 +10,6 @@ use Kyslik\ColumnSortable\Sortable;
 class Ships extends Model
 {
     use Sortable;
-    public $sortable = ['shipId', 'shipName', 'shipOwner', 'shipType'];
+    public $sortable = ['shipId', 'shipName', 'shipOwner', 'shipType', 'shipClass'];
     protected $casts = ['id' => 'string'];
 }