fix invalid auto repay enum values

add spot auto order API; trade time in spot currency pair

add margin auto repay; support transferring to sub user's futures acc…

…ount

add position close pagination, futures order book id, /wallet/fee and…

… withdrawal chain support

return etf in ticker

add etf info in spot currency pair

add spot iceberg order support; fix incorrect ContractStats fields' type

add spot currency info API; more fields in ContractStat

add sub account balance query

fix mistaken position field `dual_mode`