[pygobject] (36 commits) Non-fast-forward update to branch wip/jfelder/template-gtk4

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/template-gtk4' 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:

  d54dac3... tests: Do not use the margin property for template tests
  d05d648... tests: Do not swap signal when object is set
  f60ed0a... Gtk.Template: Fix template support for GTK4
  4d26904... gtk overrides: Add support for builder scope

Commits added to the branch:

  505c4b2... meson: Make the `pycairo` option a feature (*)
  7d5f4cd... meson: Follow up to make `pycairo` option a feature (*)
  12930c0... Update NEWS and bump version (*)
  6ffc87e... Drop Python 3.5 support and bump other dependencies (*)
  4208cf1... Revert the dependency bump for libffi (*)
  b991b9d... CI: test with Python 3.9 (*)
  2913e72... Don't call PyEval_InitThreads() with Python 3.9+ (*)
  c945c99... Replace PyUnicode_GET_SIZE() usage with PyUnicode_GET_LENGT (*)
  5657e62... gtk overrides: Remove Container use for GTK4 (*)
  b60e403... Add Nicotine+ to "Who Is Using PyGObject?" (*)
  030aa5f... tests: Remove metapath hack to import when uninstalled (*)
  c464187... tests: remove an old libtool search path (*)
  ebc0eed... tests: Remove usage of some deprecated unittest methods (*)
  e28fe69... CI: bring back lcov support (*)
  80e48fd... CI: clean up the msys2 job scripts (*)
  c28e4da... add Terminator to list of pygobject projects (*)
  ba67301... Don't assume Py_TYPE being a macro (*)
  6033ab4... tests: fix tests with glib master (*)
  8b28e38... tests: Work around a crash in the new gtk4 a11y stack (*)
  9b2942b... Simplify the version check for GTK2, GTK3, and GTK4 (*)
  4e9ba15... Remove Container from GTK4 overrides (*)
  3e64ba2... Add GTK4 override for GtkDialog (*)
  5d766d5... Drop the GtkButton override for GTK4 (*)
  01c2140... Clean up version checks some more (*)
  f0056a0... flake8 fixes (*)
  9e3ef2c... gtk4: Remove overrides for Paned (*)
  1dd6dfd... gtk4: Skip template test for now (*)
  d6e029c... tests: various fixes for gtk4 (*)
  2ab352a... Clean up Widget overrides (*)
  d1221d0... overrides: Remove various overrides for gtk4 (*)
  faff459... Gtk.Template: Fix template support for GTK4
  6dc6553... gtk overrides: Add support for builder scope
  8fa96f7... tests: Do not use the margin property for template tests
  8a1814f... tests: Do not swap signal when object is set
  cc72bbe... tests: Update template tests to work with gtk4
  28baca7... tests: Re-enable template tests for gtk4

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