Merge branch 'wl-since' into 'master'
authorMatthias Clasen <mclasen@redhat.com>
Wed, 7 Jul 2021 21:36:13 +0000 (21:36 +0000)
committerMatthias Clasen <mclasen@redhat.com>
Wed, 7 Jul 2021 21:36:13 +0000 (21:36 +0000)
Add missing "Since: 4.X" doc tags

See merge request GNOME/gtk!3736


Trivial merge