Kucoin ticker API changes

• Programming Language version: JavaScript
• CCXT version: 1.18.269
• Exchange: kucoin2
• Method: fetchTickers, fetchTicker, parseTicker

When testing, I noticed tickers weren’t getting parsed anymore. Kucoin changed the ticker format to include buy and sell (bid and ask) and removed the open and close properties.

The data format also changed a bit in fetchTickers.

https://openapi-v2.kucoin.com/api/v1/market/stats?symbol=LOOM-BTC

{
	"code": "200000",
	"data": {
		"symbol": "LOOM-BTC",
		"high": "0.0000123",
		"vol": "45161.5073",
		"datetime": 1550654614376,
		"last": "0.00001204",
		"low": "0.00001109",
		"buy": "0.00001186",
		"sell": "0.00001197",
		"changePrice": "0.00000065",
		"changeRate": "0.057"
	}
}

https://openapi-v2.kucoin.com/api/v1/market/allTickers

{
	"code": "200000",
	"data": {
		"date": 1550654263910,
		"ticker": [{
			"symbol": "LOOM-BTC",
			"high": "0.0000123",
			"vol": "45161.5073",
			"last": "0.00001204",
			"low": "0.00001109",
			"buy": "0.00001184",
			"sell": "0.00001196",
			"changePrice": "0.00000065",
			"changeRate": "0.057"
		},

[kroitor]

The recent commits reverted some of the changes related to #4715 so now percentage is wrong again.

Ouch. Pardon, my bad, will upload a refix shortly.

[rdbr]

Thanks for the fast fix!

The recent commits reverted some of the changes related to https://github.com/ccxt/ccxt/issues/4715 so now percentage is wrong again.