Moar crypto$ provider support

[goodboy]

hummingbot already has a huge backend list that we can use as reference but here's a list of resources from which we can use to drive more backends.

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Cexes:

• bitso: https://bitso.com/api_info#introduction
• kucoin: alread have #171
  • https://github.com/CoinAlpha/hummingbot/tree/master/hummingbot/connector/exchange/kucoin
  • https://github.com/p-i-/ku-py-async-trio

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cross-provider projects

• cctx js, python, php "unified" exchange apis with docs