Changes to Update a shipping method

added the new required request property data/relationships/market/data

added the new required request property data/relationships/shipping_category/data

added the new required request property data/relationships/shipping_zone/data

request property data/type was restricted to a list of enum values

removed the request property data/relationships/market/id

removed the request property data/relationships/market/type

removed the request property data/relationships/shipping_category/id

removed the request property data/relationships/shipping_category/type

removed the request property data/relationships/shipping_zone/id

removed the request property data/relationships/shipping_zone/type

added the new optional request property data/attributes/_add_tags

added the new optional request property data/attributes/_disable

added the new optional request property data/attributes/_enable

added the new optional request property data/attributes/_regenerate_shared_secret

added the new optional request property data/attributes/_remove_tags

added the new optional request property data/attributes/_reset_circuit

added the new optional request property data/attributes/external_includes

added the new optional request property data/attributes/external_prices_url

added the new optional request property data/attributes/max_weight

added the new optional request property data/attributes/min_weight

added the new optional request property data/attributes/scheme

added the new optional request property data/attributes/tax_code

added the new optional request property data/attributes/unit_of_weight

added the new optional request property data/attributes/use_subtotal

added the new optional request property data/relationships/shipping_method_tiers

added the new optional request property data/relationships/stock_location

added the new optional request property data/relationships/tags

the request property data/attributes/currency_code became nullable

the request property data/attributes/free_over_amount_cents became nullable

the request property data/attributes/metadata became nullable

the request property data/attributes/reference became nullable

the request property data/attributes/reference_origin became nullable

the type request property default value shipping_methods was removed

added the new shipping_methods enum value to the request property data/type

added the media type application/vnd.api+json for the response with the status 200