🆕 #1744 微信支付增加电商收付通-普通支付相关接口

* new:电商收付通普通支付

Co-authored-by: 曾浩 <epdcgsi@dingtalk.com>

Author: cloudX2019

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/ecommerce/CombineTransactionsRequest.java

@@ -8,7 +8,10 @@
 import java.util.List;
 
 /**
- * 合单支付 对象
+ * 合单支付API
+ * <pre>
+ * 文档地址:https://pay.weixin.qq.com/wiki/doc/apiv3/wxpay/pages/e-combine.shtml
+ * </pre>
  */
 @Data
 @NoArgsConstructor