Python-binance

**Added**

- RSA key authentication
- Support for api1, api2, api3, api4 base endpoints
- binance.us staking endpoints
- Options ticker by expiration socket
- Staking endpoints
- Pay and Convert endpoints
- Futures index info endpoint
- Open OCO Orders endpoint
- Param to pass session params to aiohttp.ClientSession


**Updated**

- Some margin endpoint versions
- Support testnet for more streams

**Fixed**

- Indefinite websocket reconnect loop
- Crash on parsing code from some errors

**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