Did a bit of archeology to get all the dates back.
I didn't add any description. Not sure if we should bother that much for
older versions (but most probably for upcoming version, would be
useful).
I also wanted to add URLs to the various news for each release, but
appstream-util would fail, telling that hyperlinks are not allowed
inside <p>. Unfortunately <release> tag cannot have a <url> child (nor a
property) according to appstream docs. So for now, I'll just stick to
date listing.