Change version to 1.3.1, do stable work on flatpak-1.2.x branch
Change version to 1.3.1, do stable work on flatpak-1.2.x branch

flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak