Feature Request: Add OrderEdit API support to commercetools-utils wrapper

[ManeeshaInterflora]

Currently the @gradientedge/commercetools-utils package doesn't expose OrderEdit APIs from the CommerceTools Platform SDK.

OrderEdits are a core CommerceTools feature that allows making changes to orders after they've been placed.
CommerceTools Documentation

Proposed solution is to add OrderEdit methods to CommercetoolsApi class following existing patterns.

[jimmythomson]

Thanks @ManeeshaInterflora - we'll get these added