Update composer.json

Author: ashtru

composer.json

@@ -11,6 +11,7 @@
         "ext-json": "*",
         "ext-simplexml": "*",
         "ext-xmlwriter": "*",
+        "goetas/xsd2php": "^2.0", 
         "goetas-webservices/xsd2php-runtime":"^0.2",
         "goetas-webservices/xsd-reader": "^0.1",
         "jms/serializer": "serializer-master-dev as 1.0"