事件：'timeout'

¥Event: 'timeout'

在使用 http2stream.setTimeout() 设置的毫秒数内没有收到此 Http2Stream 的活动后，则将触发 'timeout' 事件。其监听器不需要任何参数。

¥The 'timeout' event is emitted after no activity is received for this Http2Stream within the number of milliseconds set using http2stream.setTimeout(). Its listener does not expect any arguments.