Integrate demo trading subdomains #593
Description
Current baseurl of the demo site:
Demo Trading - Spot
https://demo-api.binance.com
wss://demo-ws-api.binance.com
wss://demo-stream.binance.com
wss://demo-stream-sbe.binance.com
Demo Trading - UM Futures:
https://demo-fapi.binance.com
wss://fstream.binancefuture.com
wss://testnet.binancefuture.com/ws-fapi/v1
Demo Trading - CM Futures:
https://demo-dapi.binance.com
wss://dstream.binancefuture.com
wss://testnet.binancefuture.com/ws-dapi/v1
https://t.me/binance_api_english/411402
https://t.me/binance_api_english/412882