futures: Implement GetLatestFundingRates across exchanges (#1339)

* adds funding rate implementations and improvements

* merge fixes x1

* lint

* kucoin funding rates func make

* migrate sync-manager to keys

* some kucoin work

* adds some kucoin wrapper funcs

* ehhh, todo

* kucoin position

* start of orders

* adds the kucoin tests yay

* multiplier

* nits, EWS includes order limits

* NotYetImplemented, IsPerp improvements, cleaning

* lint, test fix, huobi time

* fixes issues, improves testing

* fixes linters I WRECKED

* local lint but remote lint, lint, lint, lint

* fixes err

* skip CI

* lint

* Supported rates, binance endpoints

* fixes weird mocktest problems

* no, CZ is invalid

* fixes some new EWS test errors

backtester/data/kline/live/live_test.go

@@ -73,9 +73,7 @@ func TestLoadTrades(t *testing.T) {
 		ConfigFormat:  pFormat,
 	}
 	var data *gctkline.Item
-	// start is 10 mins in the past to ensure there are some trades to pull from the exchange
-	start := time.Now().Add(-time.Minute * 10)
-	data, err = LoadData(context.Background(), start, exch, common.DataTrade, interval.Duration(), cp, currency.EMPTYPAIR, a, true)
+	data, err = LoadData(context.Background(), time.Now().Add(-interval.Duration()*60), exch, common.DataTrade, interval.Duration(), cp, currency.EMPTYPAIR, a, true)
 	if err != nil {
 		t.Fatal(err)
 	}