./example_binance_dex.py error after start

[oliver-zehentleitner]

./example_binance_dex.py throws this error imediatly after the start:

`Exception in thread Thread-19:
Traceback (most recent call last):
File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/usr/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_manager.py", line 239, in _create_stream_thread
loop.run_until_complete(binance_websocket_api_socket.start_socket())
File "/usr/lib/python3.6/asyncio/base_events.py", line 484, in run_until_complete
return future.result()
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_socket.py", line 55, in start_socket
self.channels, self.markets) as websocket:
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_connection.py", line 105, in aenter
await self.send(json.dumps(payload, ensure_ascii=False))
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_connection.py", line 252, in send
await self.handler_binance_websocket_api_manager.websocket_list[self.stream_id].send(data)
KeyError: UUID('a3606f83-66c4-4423-a6f2-dd5c3666f846')

Exception in thread Thread-22:
Traceback (most recent call last):
File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/usr/lib/python3.6/threading.py", line 864, in run
self._target(*self._args, **self._kwargs)
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_manager.py", line 239, in _create_stream_thread
loop.run_until_complete(binance_websocket_api_socket.start_socket())
File "/usr/lib/python3.6/asyncio/base_events.py", line 484, in run_until_complete
return future.result()
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_socket.py", line 55, in start_socket
self.channels, self.markets) as websocket:
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_connection.py", line 105, in aenter
await self.send(json.dumps(payload, ensure_ascii=False))
File "/home/oliver/testlab/unicorn-binance-websocket-api/unicorn_binance_websocket_api/unicorn_binance_websocket_api_connection.py", line 252, in send
await self.handler_binance_websocket_api_manager.websocket_list[self.stream_id].send(data)
KeyError: UUID('f83a4842-020c-47d6-923c-328358ac596c')
`