Gtkd and Gtk4

[Alireza SN]

GTK-4.0 was released a few weeks ago and new projects will start 
using it instead of GTK3 and a lot of older project will also be 
ported to GTK4.

GtkD is one of my favorite toolkits when it comes to GUI 
programming and I have been developing lots of personal projects 
with it this year. But it seems like there isn't much activity in 
GtkD development and there are no plans to support GTK4 which 
makes me sad.

I hope GtkD catches up, and I thank everyone who spent their time 
and effort to make it possible.