webhook.go
func (w *Webhook) SendTextMsg(content string, isAtAll bool, mobiles ...string) error {
	return w.SendPayload(&Payload{
		MsgType: "text",
		Text: struct {
			Content string `json:"content"`
		}{
			Content: content,
		},
		At: struct {
			AtMobiles []string `json:"atMobiles"`
			IsAtAll   bool     `json:"isAtAll"`
		}{
			AtMobiles: mobiles,
			IsAtAll:   isAtAll,
		},
	})
}
func (w *Webhook) SendTextMsg(content string, isAtAll bool, mobiles ...string) error {
	return w.SendPayload(&Payload{
		MsgType: "text",
		Text: struct {
			Content string `json:"content"`
		}{
			Content: content,
		},
		At: struct {
			AtMobiles []string `json:"atMobiles"`
			IsAtAll   bool     `json:"isAtAll"`
		}{
			AtMobiles: mobiles,
			IsAtAll:   isAtAll,
		},
	})
}
// SendTextMsg 发送文本消息