add transfer id and sub account cross margin balances
porfolio margin account support
flash swap api; missing fields in futures auto order; wallet sub acco… …unt balances
support futures order amendment; spot candles suport 30d
futures delivery candlesticks support more intervals
add withdrawl and deposit fee; add spot currency fixed rate
spot order add fok support
add options API and currency chains API
fix incorrect data type in SpotPriceTriggeredOrder
spot public trades supports time range query