调用binance的open API链接 webSocket时报错**"1008，too many request"** 可供参考的错误原因：发起订阅或取消订阅stream时的请求次数问题
例：我订阅某K线的stream，取消订阅的请求发送了2次，那么你就会得到1008.的错误
I got an error of "1008, too many requests" when I used websocket with Binance OpenAPI.
Error reason for reference: the request times of subscription or unsubscribe is incorrect.
example: if I subscribe to a stream of kline and the unsubscribe request is sent twice, i will get error 1008, surprise.
