Support for birthday or other standard fields?

Hello,
I have a form on gravity forms that is collecting “Birthday”. But when I go to create the feed with your plugin this standard field with Constant Contact is not listed.
this is the list from constant contact of standard fields: https://knowledgebase.constantcontact.com/articles/KnowledgeBase/5695-standard-contact-headings?lang=en_US

When will this or support for other standard fields be added to the plugin (Anniversary, phone-mobile, phone-fax, phone-other, notes )

Please advise.