Cancel Orders - v0.2.0

The client now allows users to specify the status of orders that they wish to cancel. In previous versions of the client cancel_all_open_orders method was hardcoded to only cancel the OPEN and PARTIAL_FILLED orders but the extension allows users to specify any status of orders that they want to cancel.

Breaking Changes:

• cancel_all_open_orders is now renamed to cancel_all_orders.
• The method cancel_all_orders now accepts a mendatory parameter status: List[ORDER_STATUS]. All orders for the provided order statuses will be fetched, signed and sent for cancellation on exchange.