#530 微信支付申请退款接口结果类增加单个代金券相关参数 ，并根据官方文档整理其他参数

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java

@@ -131,6 +131,7 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
     String url = this.getPayBaseUrl() + "/secapi/pay/refund";
     String responseContent = this.post(url, request.toXML(), true);
     WxPayRefundResult result = BaseWxPayResult.fromXML(responseContent, WxPayRefundResult.class);
+    result.composeRefundCoupons();
     result.checkResult(this, request.getSignType(), true);
     return result;
   }