this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Iain Lane <email@example.com>
Date: Thu Nov 28 13:11:17 2019 +0000
control: Move BD from gtk-3-examples to libgtk-3-bin
gtk-encode-symbolic-svg has moved over here