Function get_ticker_statistic 

pub async fn get_ticker_statistic(
    client: &Arc<FutuClient>,
    symbol: &str,
    ticker_type: Option<i32>,
    stat_type: Option<u32>,
) -> Result<String>

v1.4.98 T2-3 (mobile-source-audit Phase 2): 逐笔统计 TickerStatistic.