release 4.8.0

Add custom order and futures order info support

Add point details in futures account and position

Add more fields in futures ticker

Rename order related functions name in futures API

set `currency_pair` spot order book as required

Fix missing required URL paramter

Releasee 4.5.0

Changelog

- update base URL

Changelog

- Add `volumn_24h_usd` and `volume_24h_btc` in `GET /futures/tickers` response