Changes to Update a creative

added the new optional request property metadata

added the new optional request property promoted/items/metadata

added the enum value metadata to the property items/ of the query request parameter fields

added the optional property metadata to the response with the 200 status

added the optional property promoted/items/metadata to the response with the 200 status

added the new SHARE enum value to the creative_type response property for the response status 200

added the new SHARE enum value to the request property creative_type

added the new optional request property labels

added the new optional request property url_tags

added the enum value labels to the property items/ of the query request parameter fields

added the enum value url_tags to the property items/ of the query request parameter fields

added the optional property labels to the response with the 200 status

added the optional property url_tags to the response with the 200 status