Base package against continued fork

[Alexmitter]

Hello, someone continued the work and added support for things like libhandy widgets, please change to this as the base of the flatpak https://github.com/jnsh/arc-theme

[jairoraiol]

Hi!
On this new base for the flatpak: https://github.com/jnsh/arc-theme

I am also looking forward to this change.
Currently, on Flathub, there is no Lighter variant.

Thank you.

[hossamdash]

@TingPing
I hope you look into this when you have time as this fork has support for gtk4 and is currently actively maintained. a lot of flatpak applications are using gtk4 now and it would be nice for arc-dark theme to be applied to them instead of falling back to Adwaita.

[TingPing]

This uses the new fork now. GTK4 is another discussion to add to the runtimes.

[hossamdash]

Oh sorry. The old url in the .appdata.xml file threw me off. that should be changed too.

[TingPing]

Oh sorry. The old url in the .appdata.xml file threw me off. that should be changed too.

Updated.