Changes to List Orders

added the new merged enum value to the orders/items/state response property for the response status 200

added the enum value merged to the property anyOf[subschema #1]/items/ of the query request parameter status

added the new cancelled enum value to the orders/items/state response property for the response status 200

added the new cancelling enum value to the orders/items/state response property for the response status 200

added the new expired enum value to the orders/items/state response property for the response status 200

added the enum value cancelled to the property anyOf[subschema #1]/items/ of the query request parameter status

added the enum value cancelling to the property anyOf[subschema #1]/items/ of the query request parameter status

added the enum value expired to the property anyOf[subschema #1]/items/ of the query request parameter status

added the optional property orders/items/cancel_reason to the response with the 200 status

endpoint added