Add dkb enum (#160)

* Add DKB

* Add DKB

Author: deryacakmak

src/Model/ApmType.php

@@ -23,6 +23,7 @@ class ApmType
     const HASO = 'HASO';
     const PAYCELL = 'PAYCELL';
     const ZIP = 'ZIP';
+    const DKB = 'DKB';
     const MULTINET = 'MULTINET';
     const MULTINET_GIFT = 'MULTINET_GIFT';
     const MULTINET_NEO_GIFT = 'MULTINET_NEO_GIFT';

src/Model/PaymentProvider.php

@@ -23,6 +23,7 @@ class PaymentProvider
     const HASO = "HASO";
     const PAYCELL = "PAYCELL";
     const ZIP = "ZIP";
+    const DKB = "DKB";
     const MULTINET = "MULTINET";
     const YKB_WORLD_PAY_SHOPPING_LOAN = "YKB_WORLD_PAY_SHOPPING_LOAN";
     const ALIPAY = "ALIPAY";