Starting with version 1.80, girepository moved from gobject
introspection into glib and bump the API version to 2.0. This change
adds flags to support both API versions.

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Hi,

"six" is being removed from Debian,

   https://wiki.debian.org/Python3-six-removal

... quite successfully (look at the graph)

   https://qa.debian.org/popcon-graph.php?packages=python3-six%20python-six-doc&show_installed=on&want_legend=on&want_ticks=on&date_fmt=%25Y-%25m&beenhere=1

this patch remove the old Py 2 + 3 shim integration

otherwise "six" must be brought in back again by "pluma"

https://tracker.debian.org/news/1686894/accepted-pluma-1280-2-source-into-unstable/

(this one change should be reverted once this one got in)

Greetings

The PlumaApp was not being registered with GtkApplication, leading to
segfaults when restoring state through the sesion manager.

Instead of using GtkWindow, we create a PlumaApplication that inherits
from GtkApplication. This is the initial groundwork for deprecating
a bunch of old GTK functions (like GtkActions).

Bumps [actions/cache](https://github.com/actions/cache) from 3 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v3...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>