1.新增php推送订阅者openid接口

2.库存预警更改为公众号推送
3.sku商品上下架最低价不正确问题

src/main/java/com/chaozhanggui/system/cashierservice/entity/dto/WxMsgSubDTO.java

@@ -0,0 +1,9 @@
+package com.chaozhanggui.system.cashierservice.entity.dto;
+
+import lombok.Data;
+
+@Data
+public class WxMsgSubDTO {
+    private String shopId;
+    private String openId;
+}