Fix: Change ErrorCode field type from int to string in SubscribeMsgSentList

Co-authored-by: silenceper <2044558+silenceper@users.noreply.github.com>

README.md

@@ -4,6 +4,8 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/silenceper/wechat/v2)](https://goreportcard.com/report/github.com/silenceper/wechat/v2)
 [![pkg](https://img.shields.io/badge/dev-reference-007d9c?logo=go&logoColor=white&style=flat)](https://pkg.go.dev/github.com/silenceper/wechat/v2?tab=doc)
 ![GitHub release (latest SemVer)](https://img.shields.io/github/v/release/silenceper/wechat?sort=semver)
+![star](https://gitcode.com/silenceper/wechat/star/badge.svg)
+
 
 使用Golang开发的微信SDK，简单、易用。
 

miniprogram/message/message.go

@@ -556,7 +556,7 @@ type SubscribeMsgSentEvent struct {
 type SubscribeMsgSentList struct {
 	TemplateID  string `xml:"TemplateId" json:"TemplateId"`
 	MsgID       string `xml:"MsgID" json:"MsgID"`
-	ErrorCode   int    `xml:"ErrorCode" json:"ErrorCode"`
+	ErrorCode   string `xml:"ErrorCode" json:"ErrorCode"`
 	ErrorStatus string `xml:"ErrorStatus" json:"ErrorStatus"`
 }