0.18 and 0.19 have a bug that will prevent library detection,
but other versions should be fine.
- * GTK+ (http://www.gtk.org/), version 2.16.0 or later.
+ * GTK+ (http://www.gtk.org/), version 2.24.0 or later.
* GtkSourceView (http://projects.gnome.org/gtksourceview/)
version 2.2 or later.