gnu: Update gtkmm to 4.2.0, add gtkmm@3, and adjust gtkmm@2.

* gnu/packages/gtk.scm (gtkmm)[version]: Update to 4.2.0.
[arguments](meson): New argument.
[native-inputs]: Add glib:bin.
[propagated-inputs]: Replace gtk+ with gtk.
(gtkmm-3): New variable.
(gtkmm-2)[arguments]: Strip certain inherited arguments.
* gnu/packages/animation.scm (synfigstudio)[inputs]: Switch to gtkmm-3.
* gnu/packages/astronomy.scm (stackistry)[inputs]: Ditto.
* gnu/packages/audio.scm (guitarix)[inputs]: Ditto.
* gnu/packages/disk.scm (parted)[inputs]: Ditto.
* gnu/packages/gnome.scm (gnome-system-monitor)[inputs]: Ditto.
(workrave)[inputs]: Ditto.
(gnote)[inputs]: Ditto.
* gnu/packages/gobby.scm (gobby)[inputs]: Ditto.
* gnu/packages/inkscape.scm (inkscape)[inputs]: Ditto.
* gnu/packages/mail.scm (astroid)[inputs]: Ditto.
* gnu/packages/mate.scm (mate-system-monitor)[inputs]: Ditto.
* gnu/packages/music.scm (tascam-gtk)[inputs]: Ditto.
* gnu/packages/photo.scm (rawtherapee)[inputs]: Ditto.
* gnu/packages/pulseaudio.scm (pavucontrol)[inputs]: Ditto.
(paprefs)[inputs]: Ditto.
* gnu/packages/text-editors.scm (jucipp)[inputs]: Ditto.
* gnu/packages/wm.scm (waybar)[inputs]: Ditto.

1 files changed, 1 insertions, 1 deletions

diff --git a/gnu/packages/wm.scm b/gnu/packages/wm.scm
index 1986fbb60c..eec22c1428 100644
--- a/gnu/packages/wm.scm
+++ b/gnu/packages/wm.scm
@@ -1652,7 +1652,7 @@ modules for building a Wayland compositor.")
     (inputs `(("date" ,date)
               ("fmt" ,fmt)
               ("gtk-layer-shell" ,gtk-layer-shell)
-              ("gtkmm" ,gtkmm)
+              ("gtkmm" ,gtkmm-3)
               ("jsoncpp" ,jsoncpp)
               ("libdbusmenu" ,libdbusmenu)
               ("libinput" ,libinput)