build: Require libadwaita 1.4.alpha
AdwToolbarView was added in libadwaita 1.4.alpha
Fixes 8590f721
Originally reported at https://bugs.debian.org/1043559
Edited by Jeremy Bicha
AdwToolbarView was added in libadwaita 1.4.alpha
Fixes 8590f721
Originally reported at https://bugs.debian.org/1043559