chore: bump version to 1.1.19

- Cargo.toml, tauri.conf.json, package.json, snapcraft.yaml
- Regenerate Cargo.lock and package-lock.json
- Add metainfo release entry for 1.1.19

src-tauri/Cargo.lock

@@ -4594,7 +4594,7 @@ dependencies = [
 
 [[package]]
 name = "qbz-nix"
-version = "1.1.19-rc-1"
+version = "1.1.19"
 dependencies = [
  "aes-gcm",
  "alsa 0.9.1",