Merge pull request #4 from ft23/patch-1

Update PurchaseRequest.php

Author: yasinkuyu

src/Message/PurchaseRequest.php

@@ -26,7 +26,7 @@ class PurchaseRequest extends AbstractRequest {
         'halkbank' => 'sanalpos.halkbank.com.tr',
         'anadolubank' => 'anadolusanalpos.est.com.tr',
         'hsbc' => 'vpos.advantage.com.tr',
-        'ziraatbank' => 'sanalpos2.ziraatbank.com.tr'
+        'ziraatbank' => 'sanalpos2.ziraatbank.com.tr',
 
         // Todo
         'ingbank' => 'ingbank.est.com.tr',