Dear Dennis @weodeo
Interesting and worthy question! :)
This could be done one of two ways i believe,
The first would be trying out a very simple WP plugin that gives you a notification upon updates, however keep it simple so that it doesn't clash with Lay Theme - we are unable to provide deeper support for potential clashes given all the number of third-party plugins out there sorry we couldn't keep up.
The second option,
I will add this to the development notes for future discussion, that based on all the email addresses set up we would send out 7000+ emails every update! :)
Apologies that i am unable to provide any clearer solution at this point even though i wish to help,
Best wishes and thank you for using Lay Theme and for this good question