fix: use gtk_layer_set_keyboard_mode()

`gtk_layer_set_keyboard_interactivity()` is deprecated and was removed
in gtk4-layer-shell.
Note that this bumps version requirement to 0.6.0

meson.build

@@ -120,7 +120,7 @@ if libsndio.found()
     endif
 endif
 
-gtk_layer_shell = dependency('gtk-layer-shell-0', version: ['>=0.5.0'],
+gtk_layer_shell = dependency('gtk-layer-shell-0', version: ['>=0.6.0'],
         default_options: ['introspection=false', 'vapi=false'],
         fallback: ['gtk-layer-shell', 'gtk_layer_shell'])
 systemd = dependency('systemd', required: get_option('systemd'))

src/bar.cpp

@@ -105,7 +105,7 @@ struct GLSSurfaceImpl : public BarSurface, public sigc::trackable {
     output_name_ = output.name;
     // this has to be executed before GtkWindow.realize
     gtk_layer_init_for_window(window_.gobj());
-    gtk_layer_set_keyboard_interactivity(window.gobj(), FALSE);
+    gtk_layer_set_keyboard_mode(window.gobj(), GTK_LAYER_SHELL_KEYBOARD_MODE_NONE);
     gtk_layer_set_monitor(window_.gobj(), output.monitor->gobj());
     gtk_layer_set_namespace(window_.gobj(), "waybar");