Fingerpaint

Bugfixes:
- `dconf` was broken (it didn't display the value of a key if it was the default value) so I switched to `gsettings` (Should fix 12 and 24)

Misc:
- Switched to `PIL.Image.LANCZOS` instead of `.ANTIALIAS` (which is deprecated)

**Full Changelog**: https://github.com/Wazzaps/fingerpaint/compare/v1.2.6...v1.2.7

Bugfixes:
- Add warning if `XDG_SESSION_TYPE` is not specified

Misc:
- Added Nix flake

**Full Changelog**: https://github.com/Wazzaps/fingerpaint/compare/v1.2.5...v1.2.6

Bugfixes:
- Remove `xinput` check if running on Wayland, replace with needed `dconf` check

**Full Changelog**: https://github.com/Wazzaps/fingerpaint/compare/v1.2.4...v1.2.5

New Features:
- Added support for `--fullscreen`.

**Full Changelog**: https://github.com/Wazzaps/fingerpaint/compare/v1.2.3...v1.2.4

Added hotfix for Arch/Manjaro based distros + Verify pillow version

Arch/Manjaro problem was that it doesn't set `/org/gnome/desktop/peripherals/touchpad/send-events` to any value by default. I assume it's "enabled" if it's empty now

Work with old `pillow` versions (i.e. the one that comes with Ubuntu 20.04)