Drop-OSS/drop v0.4.0-test-flatpak-2

on GitHub

What's Changed

• Allow adding non-empty folders to library in client by @DecDuck in #512
• Add PKCE support by @DecDuck in #513
• Add flatpak by @DecDuck in #514

Full Changelog: v0.4.0-rc-6...v0.4.0-test-flatpak-2