add directbanking to list of supported methods

pass/app/payment_processor/Micropayment.js

@@ -10,7 +10,7 @@ class Micropayment extends PaymentProcessor {
   /**
    * @var {string[]}
    */
-  #supported_services = ["sofort", "prepay", "lastschrift"];
+  #supported_services = ["sofort", "prepay", "lastschrift", "directbanking"];
 
   /**
    * @var {string}