* Kucoin: Fix ProcessMarketSnapshot and add a test
* Kucoin: ProcessMarketSnapshot: move the check before the ticker
* Kucoin: remove time.sleep from the test, add if statement to processmarketSnapshot
* Kucoin: ProcessMarketSnapshot to send margin, spot and both margin and spot pair data
* Kucoin: range over listOfAssetsCurrencyPairEnabledFor which returns a slice
* Kucoin: linter fix and pointers placed
* Kucoin: removed AssetWebsocketSupport and ku.CurrencyPairs.IsAssetEnabled, linter error fixed, comment amended
