Gnuastro has a dedicated mailing list for making announcements (
Anyone can subscribe to this mailing list.
Anytime there is a new stable or test release, an email will be circulated there.
The email contains a summary of the overall changes along with a detailed list (from the NEWS file).
This mailing list is thus the best way to stay up to date with new releases, easily learn about the updated/new features, or dependencies (see Dependencies).
To subscribe to this list, please visit https://lists.gnu.org/mailman/listinfo/info-gnuastro. Traffic (number of mails per unit time) in this list is designed to be low: only a handful of mails per year. Previous announcements are available on its archive.