chore: Add missing newline in QueuedExportWithProperties stub file

Author: imhayatunnabi

tests/Data/Stubs/QueuedExportWithProperties.php

@@ -1,6 +1,7 @@
 <?php
 
 namespace Maatwebsite\Excel\Tests\Data\Stubs;
+
 use Maatwebsite\Excel\Concerns\Exportable;
 use Maatwebsite\Excel\Concerns\WithMultipleSheets;
 use Maatwebsite\Excel\Concerns\WithProperties;