* Kucoin: Fix unmarshalling of FuturesTicker resp
* Fix several string float64 fields not unmarshalling
* Fix time field misnamed; Make a time.Time
* Use order.Side for sides
* Add tests
This change opts to expose float64 instead of StringToFloat64 because
there's no wrapper to convert the type over, and it's not a websocket.
Essentially choosing to not expose internal convert types for methods
called directly.
Possible we'll eventually harmonise this with a types.Number or
something.
* Kucoin: FuturesRealTimeTicker => FuturesTicker
Kucoin only call it RealTime in the first sentence of their docs. None of the API names, endpoints or any thing mention RealTime.
This is just a ticker
* Tests: Improve clarity of failed push data
* Kucoin: Move PushData to a fixture file
This avoids both the linter errors, and the bloat.
Loses the name of the "test", but I think that's okay
