[pygobject] (14 commits) Non-fast-forward update to branch unknown-scope

[Christoph Reiter <creiter src gnome org>]

The branch 'unknown-scope' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  1ff67e9... Do not error out for unknown scopes

Commits added to the branch:

  34a9124... subprojects: Use GLib main branch (*)
  86a6b8f... ci: Limit depth of subprojects when cloning (*)
  c4d1b44... Fix some small memory leaks (*)
  945d912... Fix a couple of memory leaks in the tests (*)
  c8518e1... `cairo-gobject-devel` is needed for Fedora (*)
  d612f3c... release (*)
  16024ae... version bump (*)
  a0347d8... CI: Update all Python versions and add 3.10 (*)
  f9425cf... Drop support for Python 3.6 (*)
  b639976... poetry: add support for sphinx v4 and sphinx-rtd-theme v1 (*)
  993ae90... tests: silence a deprecation warning with newer glib (*)
  db472c1... gtk overrides: restore Gtk.ListStore.insert_with_valuesv wi (*)
  dea457c... Implement DynamicImporter.find_spec() (*)
  792ab35... Do not error out for unknown scopes

(*) This commit already existed in another branch; no separate mail sent