GNOME updater

[Ludovic Courtès]

I was distracted from important stuff and found myself writing a GNOME
updater, brought to you in commit e80c0f8.

Useful, and at the same time scary:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix refresh -t gnome 
gnu/packages/mail.scm:211:13: gmime would be upgraded from 2.6.19 to 2.6.20
gnu/packages/gtk.scm:388:12: gdk-pixbuf would be upgraded from 2.32.1 to 2.33.1
gnu/packages/gtk.scm:573:12: gtk+ would be upgraded from 3.18.2 to 3.19.4
gnu/packages/gtk.scm:482:12: at-spi2-atk would be upgraded from 2.18.1 to 2.19.2
gnu/packages/gtk.scm:340:12: gtksourceview would be upgraded from 3.18.1 to 
3.19.2
gnu/packages/gtk.scm:826:13: pangomm would be upgraded from 2.38.1 to 2.39.1
gnu/packages/gtk.scm:437:12: at-spi2-core would be upgraded from 2.18.1 to 
2.19.2
gnu/packages/gtk.scm:875:13: gtkmm would be upgraded from 3.18.0 to 3.19.3
gnu/packages/gtk.scm:852:13: atkmm would be upgraded from 2.24.1 to 2.24.2
gnu/packages/gnome.scm:3237:13: gvfs would be upgraded from 1.24.1 to 1.26.2
gnu/packages/gnome.scm:1302:13: libgnomeprint would be upgraded from 2.8.2 to 
2.18.8
gnu/packages/gnome.scm:2553:13: aisleriot would be upgraded from 3.16.1 to 
3.18.2
gnu/packages/gnome.scm:3538:13: yelp-tools would be upgraded from 3.16.1 to 
3.18.0
gnu/packages/gnome.scm:1922:13: glib-networking would be upgraded from 2.46.1 
to 2.47.1
gnu/packages/gnome.scm:1762:13: dconf would be upgraded from 0.22.0 to 0.24.0
gnu/packages/gnome.scm:1517:13: gnumeric would be upgraded from 1.12.17 to 
1.12.24
gnu/packages/gnome.scm:3978:13: evolution-data-server would be upgraded from 
3.18.2 to 3.19.2
gnu/packages/gnome.scm:1686:13: vte would be upgraded from 0.40.0 to 0.43.0
gnu/packages/gnome.scm:1460:13: goffice would be upgraded from 0.10.14 to 
0.10.24
gnu/packages/gnome.scm:331:13: gnome-keyring would be upgraded from 3.16.0 to 
3.18.3
gnu/packages/gnome.scm:3890:13: mutter would be upgraded from 3.18.1 to 3.19.2
gnu/packages/gnome.scm:748:13: glade would be upgraded from 3.8.4 to 3.19.0
gnu/packages/gnome.scm:1340:13: libgnomeprintui would be upgraded from 2.8.2 to 
2.18.6
gnu/packages/gnome.scm:2589:13: devhelp would be upgraded from 3.16.1 to 3.18.1
gnu/packages/gnome.scm:462:13: gsettings-desktop-schemas would be upgraded from 
3.18.0 to 3.19.2
gnu/packages/gnome.scm:2167:13: gnome-terminal would be upgraded from 3.16.0 to 
3.19.1
gnu/packages/gnome.scm:3806:13: gedit would be upgraded from 3.18.1 to 3.19.1
gnu/packages/gnome.scm:3691:13: file-roller would be upgraded from 3.10.0 to 
3.16.4
gnu/packages/gnome.scm:2121:13: gnome-mines would be upgraded from 3.16.0 to 
3.19.2
gnu/packages/gnome.scm:2764:13: clutter-gst would be upgraded from 3.0.6 to 
3.0.14
gnu/packages/gnome.scm:177:13: gnome-desktop would be upgraded from 3.18.1 to 
3.19.2
gnu/packages/gnome.scm:2462:13: gnome-settings-daemon would be upgraded from 
3.16.0 to 3.18.2
gnu/packages/gnome.scm:3159:12: eog would be upgraded from 3.16.2 to 3.19.2
gnu/packages/gnome.scm:3479:13: yelp-xsl would be upgraded from 3.16.1 to 3.18.1
gnu/packages/gnome.scm:2890:13: grilo would be upgraded from 0.2.12 to 0.2.14
gnu/packages/gnome.scm:300:13: libgnome-keyring would be upgraded from 3.6.0 to 
3.12.0
gnu/packages/gnome.scm:587:13: adwaita-icon-theme would be upgraded from 3.16.2 
to 3.18.0
gnu/packages/gnome.scm:774:13: libcroco would be upgraded from 0.6.8 to 0.6.9
gnu/packages/gnome.scm:398:13: evince would be upgraded from 3.18.1 to 3.18.2
gnu/packages/gnome.scm:3503:13: yelp would be upgraded from 3.16.1 to 3.19.1
gnu/packages/gnome.scm:2004:13: libsoup would be upgraded from 2.52.1 to 2.53.2
gnu/packages/gnome.scm:3373:13: epiphany would be upgraded from 3.16.3 to 3.18.1
gnu/packages/gnome.scm:2326:13: geocode-glib would be upgraded from 3.16.0 to 
3.18.0
gnu/packages/gnome.scm:2795:13: libchamplain would be upgraded from 0.12.10 to 
0.12.12
gnu/packages/gnome.scm:3940:13: gnome-online-accounts would be upgraded from 
3.18.1 to 3.19.2
gnu/packages/gnome.scm:2993:13: totem would be upgraded from 3.16.1 to 3.18.1
gnu/packages/gnome.scm:2859:13: gnome-klotski would be upgraded from 3.16.1 to 
3.19.1
gnu/packages/gnome.scm:2736:13: clutter-gtk would be upgraded from 1.6.0 to 
1.6.6
gnu/packages/gnome.scm:1612:13: seahorse would be upgraded from 3.16.0 to 3.18.0
gnu/packages/gnome.scm:2074:13: libsecret would be upgraded from 0.18 to 0.18.3
gnu/packages/gnome.scm:155:13: gnome-common would be upgraded from 3.14.0 to 
3.18.0
gnu/packages/gnome.scm:4196:13: network-manager-applet would be upgraded from 
1.0.6 to 1.0.8
gnu/packages/gnome.scm:837:13: librsvg would be upgraded from 2.40.11 to 2.40.12
gnu/packages/gnome.scm:2941:13: grilo-plugins would be upgraded from 0.2.14 to 
0.2.16
gnu/packages/glib.scm:141:12: glib would be upgraded from 2.46.1 to 2.47.3
gnu/packages/glib.scm:436:13: glibmm would be upgraded from 2.46.1 to 2.47.3.1
gnu/packages/glib.scm:409:13: libsigc++ would be upgraded from 2.6.1 to 2.6.2
gnu/packages/glib.scm:230:13: gobject-introspection would be upgraded from 
1.46.0 to 1.47.1
--8<---------------cut here---------------end--------------->8---

Enjoy!  :-)

Ludo’.