Prevent never awaited coroutine from KeepAliveWebsocket._keepalive_socket
Prevent never awaited coroutine from KeepAliveWebsocket._keepalive_socket

Though `asyncio.create_task` is run after timeout,
`self._keepalive_socket()` is run right after connect.
When the socket is unexpectedly canceled, this happens
never-awaited coroutine error.

sammchardy/python-binance