Release 0.4.0

It's been a while, hasn't it? I'm back, but please allow everyone some time to work through the issues and pull requests :)

What's Changed

• update gtk rs by @xou816 in #589
• Update to librespot 0.4.2 by @janbrummer in #583
• Feature / Fix?: Follow the system theme by @ctsk in #548
• Mark as single main window app by @nicolasfella in #526
• Implement track preloading for gapless playback by @supremesnickers in #532
• Try to unlock the keyring collection when it is locked by @rainDiX in #560
• Dependencies updates by @xou816 in #595
• fix overlap between timestamp and long song title by @XGZepto in #597
• fix #558 by @xou816 in #598
• Playlist edition by @xou816 in #590
• Resolve #539 by @SomewhereOutInSpace in #599
• Bump secret-service from 2.0.2 to 3.0.1 by @dependabot in #603
• use librespot's cache by @xou816 in #605
• 0.4.0 by @xou816 in #608

New Contributors

• @janbrummer made their first contribution in #583
• @ctsk made their first contribution in #548
• @supremesnickers made their first contribution in #532
• @rainDiX made their first contribution in #560
• @XGZepto made their first contribution in #597
• @SomewhereOutInSpace made their first contribution in #599

Full Changelog: 0.3.3...0.4.0

Thanks to all the contributors who are somehow still around :) If you feel like you've been unjustly forgotten from the AUTHORS or TRANSLATORS file, feel free to open a PR.