Zenity 3.99.0
  1st beta release of the upcoming zenity 4.x, based on libadwaita/gtk4.

  I would consider this release feature-complete for 4.0, but there are still
  some bug reports flowing in, particularly for STDIN-related operations, that
  need some further tweaking before a stable 4.0 release.

    - option: Add various non-fatal deprecation warnings that were previously
      missing, and fix a misleading deprecation message for `--window-icon`
      (Logan Rathbone)
    - main: Add G_APPLICATION_FLAGS_NON_UNIQUE to GApplication flags (fixes
      #58) (Logan Rathbone)
    - util: remove fatal assert on exit if window invalid GtkWindow (Logan
      Rathbone)
    - progress: Cleanup unnecessary static objects and remove spurious builder
      unref (Logan Rathbone)
    - util: Ignore superfluous quit requests (Logan Rathbone)
    - util: Remove superfluous GtkWindow cast check (Logan Rathbone)
    - data: Manpage generation changes; don't automatically generate the
      manpage from help2man for now (this will preferably be reinstated
      post-4.0 once the issues are worked out) (Logan Rathbone)
    - a11y: Label the widgets in a forms UI properly (Lukáš Tyrychtr)
    - Translation updates:
        Anders Jonsson (sv)
        Ekaterine Papava (ka)
        Jordi Mas i Hernandez (ca)
        Kukuh Syafaat (id)
        Piotr Drąg (pl)
        Sabri Ünal (tr)
        Sergej A (ru)
        Yuri Chornoivan (uk)