Bump version to 4.9.9 in appdata

Bump version to 4.9.0

Bump version to 4.4.0

Update screenshots

Bump version to 3.1.0

♻️ Migrate to latest gtk-flutter package

🔖 Bump version to 3.0.0
⚰️ Remove dead code

Bump version to 2.9.0 [skip ci]

Use native flutter embedder instead of nativeshell

Trying to fix ci (again)

Run in shell