py-websocket-client: updated to 0.47.0

0.47.0:
- Fix socket constructor in _open_socket to use all relevant variables from getaddrinfo.
- .send() method is very slow
- cross-platform aync multi-client solution
- Fix detecting timeouts with SSL in recv
- Fix WebSocketApp does not poll for data correctly when using SSL
- Fix Infinite ping/pong timeouts in WebSocketApp.run_forever
- Added status message when HTTP can't be upgraded to WS

(adam)