Owlkettle 2.0.0 is a declarative GUI framwork for GTK 4

[can-lehmann]

Looks great!

I really like that you could write something like
    
    
    Box:
      Label(@expand = false):
        text = "Hello"
    
    
    Run

without breaking backwards compatibility. I will look into implementing 
something like this in Owlkettle.