add tests batch 20

tests/Unit/Services/Refunds/RefundQueryServiceTest.php

@@ -40,7 +40,7 @@ class RefundQueryServiceTest extends TestCase
             ],
         ]);
 
-        $service = new RefundQueryService;
+        $service = new RefundQueryService();
         $result = $service->list(['status' => 'Approved', 'per_page' => 10, 'page' => 1]);
 
         $this->assertSame(1, $result['pagination']['total']);