^^^^^^^^^^^^^^^^^^^^
**Added**
- pass limit param to all kline functions
- increase default for kline functions from 500 to 1000
- add HistoricalKlinesType.FUTURES_COIN as option for kline functions
- testnet URL for coin_futures_socket
**Updated**
- round_step_size more accurate
**Fixed**
- remove deprecated loop param
- websockets unpinned
- hanging websockets in exiting state
- check start_ts after end_ts for klines
- multi assets margin params