Binance Futures APIs USDT and COIN

· Features

From sgcWebSockets 4.4.7, both Binance Futures APIs are supported: USDT and COIN.

USD Futures: https://binance-docs.github.io/apidocs/futures/en

COIN Futures: https://binance-docs.github.io/apidocs/delivery/en

Configuration 

Client can connect to USDT or COIN Binance Futures, set which contract you want to trade using FuturesContracts property:
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