update readme

README.md

@@ -2,7 +2,7 @@ Yet Another Dialog
 ====================
 
 Program allows you to display GTK+ dialog boxes from command line or 
-shell scripts. YAD depends on GTK+ only. Minimal GTK+ version is 2.16.0
+shell scripts. YAD depends on GTK+ only. Minimal GTK+ version is 3.22.0
 
 This software is licensed under the GPL v.3
 
@@ -28,12 +28,10 @@ autoreconf -ivf && intltoolize
 For successfully build you may need to install the following packages:
 * GNU Autotools (https://www.gnu.org/software/autoconf/ http://www.gnu.org/software/automake/)
 * Intltool >= 0.40.0 (http://freedesktop.org/wiki/Software/intltool/)
-* GTK+ >= 2.16.0 (http://www.gtk.org)
+* GTK+ >= 3.22.0 (http://www.gtk.org)
 with appropriate *-dev* packages depending on your distro
 
 Additionally, you can build yad with the following libraries:
 * Webkit - for supporting HTML dialog (http://webkitgtk.org)
 * GtkSourceView - for enabling syntax highlighting in text-info dialog (https://wiki.gnome.org/Projects/GtkSourceView)
 * GtkSpell3 - for support spell checking in text fields (http://gtkspell.sourceforge.net/)
-
-Yad can be built against both 2 and 3 versions of GTK+ library. Preferred build with version 2