Bittrade-kraken-rest

Changed

- `oflags` not sent when not sent (fixes order creation error)

Added

- Status of recent withdrawals

Added

- Extended balance

- Add cancel order endpoint
- Add add order endpoint
- Add withdraw funds endpoint
- Add check recent deposits status endpoint
- More top level exports

- Add cancel all orders endpoint

- Complete overhaul to use Observables
- Add Black, iSort, mypy and pyright
- Nothing that worked on 0.10 will work anymore