Create Or Update Contact with unlinkListIds

[ybert]

When we create or update a contact we love to use the updateUnabled option to don't care if the contact is already in sendinblue and just synchronize it.

The issue here is the Create Contact API allows to pass the unlinkListIds field and manage it (even if it's not documented) but the PHP SDK doesnt.
It could be great to allow this in the PHP SDK.

If we can't pass this field we have to make a second call on the API to update the unlinkListIds field after the Create or Update call.

[OrangePixelLtd]

getbrevo/brevo-php#18 fixes this issue.