- implement coinank free kline api in coinank_api.Kline
- implement coinank free kline ws in coinank_api.KlineWs. if needKline is true, kline data read from KlineCh. if needTicker is true, tickers data read from TickersCh.
- implement LiquidationExchangeStatistics,LiquidationCoinAggHistory in provider/coinank/liquidation.go
- implement LiquidationHistory,LiquidationOrders in provider/coinank/liquidation.go
- implement OpenInterestAll,OpenInterestChartV2,OpenInterestSymbolChart,OpenInterestKline in provider/coinank/open_interest.go
- implement OpenInterestAggKline,TickersTopOIByEx,InstrumentsOiVsMc in provider/coinank/open_interest.go