New Offchain Cancel Order API and List Collections `Order By` Option

Today we introduced a new API endpoint for cancelling orders offchain that use the SignedZone: https://docs.opensea.io/reference/cancel_order

By popular demand, we also introduced an Order By option to the List Collections endpoint: https://docs.opensea.io/reference/list_collections

These have been added in the latest release of opensea-js, v7.1.8.