fix: go.mod go version to 1.22 (升级go.mode的版本到1.22)
fix: fixed fd deletion failure, causing fd to be used by other new connections (解决连接关闭时没有正确删除fd，导致消息串到其他fd上)
fix: #127
chore: use fmt.Errorf （使用fmt.Errorf拼接错误）
chore: drop ioutil package （移除ioutil包）
fix: solve the problem that the RouteAPI log object is not initialized, causing it to crash when calling this log printing（解决RouteAPI对象里没有初始化Log对象的问题，导致请求到RouteAPI会崩溃）
fix: solve the problem of crash caused by conversation map competition lock （解决conversationManager里多并发下导致Map锁竞争）
fix: solve the problem of a large number of connections being closed at the same time, causing the CPU to soar (解决大量连接同时关闭时，导致CPU飙升并且不降下来)
