The changelog is a list of backwards-incompatible updates in the API. As described before, new additions and forwards-compatible changes don’t need a new API version and will not appear in this list.
payment.amountparameter must not be passed in the endpoint checkouts/1/complete.
payment.handleparameter in endpoint checkouts/1/complete now accepts all handles that are listed within endpoint payment-methods.
includeparameter is replaced by the
ids. You have to use
?expand=variantsto show the complete resource
links.lastwill always be
shipping_lineattribute removed in orders endpoint and added a