feat: promotional and purchase vouchers

src/BusProNet/XmlParser/ApiResponseParser.php

@@ -69,6 +69,10 @@ class ApiResponseParser extends AbstractParser
                 return (new TravelParser())->parse($travelNode->first(), ...$additionalArgs);
             case ApiClient::TYPE_AGENCIES:
                 return (new AgencyParser())->parse($resultNode);
+            case ApiClient::TYPE_PURCHASE_VOUCHER:
+                return (new PurchaseVoucherParser())->parse($resultNode);
+            case ApiClient::TYPE_PROMO_VOUCHER:
+                return (new PromoVoucherParser())->parse($resultNode);
         }
 
         throw new ResponseParserException('Unable to parse XML response');