Important infos, [please read!](https://github.com/LUCIT-Systems-and-Development/unicorn-binance-websocket-api/issues/38)
Added
- `unicorn_binance_websocket_api_manager.is_exchange_type()`
- support for subscribe/unsubscribe for CEX websockets
- `unicorn_binance_websocket_api_manager.get_stream_subscriptions()`
- `unicorn_binance_websocket_api_manager.increase_transmitted_counter()` and added output to
`print_summary()` and `print_stream_info()`
- `split_payload()`
Changed
- The 8004 char limit for URIs on websocket connect is bypassed via subscriptions with websocket.send() and
`is_websocket_uri_length_valid()` allways returns `True` now!
Fixed
- Subscribe/unsubscribe items of DEX websockets ([card 5](https://github.com/LUCIT-Systems-and-Development/unicorn-binance-websocket-api/projects/5#card-23700264))
- `['receives_statistic_last_second']` dict is changing size during iteration. ([issue 37](https://github.com/LUCIT-Systems-and-Development/unicorn-binance-websocket-api/issues/37))