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
add new status enum in LedgerRecord; add auto_size in FuturesOrder
support total balance API