[gnome-session] configure: bump minimum library requires to 3.18 ones

[Ray Strode <halfline src gnome org>]

commit 8c277825f106f051f806f496a944534342410a4e
Author: Ray Strode <rstrode redhat com>
Date:   Wed Oct 14 09:43:15 2015 -0400

    configure: bump minimum library requires to 3.18 ones
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756546

 configure.ac |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2f6ec7c..5d512e3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_INIT([gnome-session],
-        [3.17.92],
+        [3.18.0],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=gnome-session])
 
 AC_CONFIG_SRCDIR([gnome-session])
@@ -33,12 +33,12 @@ if test "x$enable_deprecation_flags" = "xyes"; then
    AC_SUBST([DISABLE_DEPRECATED_CFLAGS])
 fi
 
-GLIB_REQUIRED=2.35.0
-GTK3_REQUIRED=2.90.7
+GLIB_REQUIRED=2.46.0
+GTK3_REQUIRED=3.18.0
 DBUS_GLIB_REQUIRED=0.76
 UPOWER_REQUIRED=0.9.0
 JSON_GLIB_REQUIRED=0.10
-GNOME_DESKTOP_REQUIRED=3.9.91
+GNOME_DESKTOP_REQUIRED=3.18.0
 
 AC_ARG_ENABLE(session-selector, AS_HELP_STRING([--enable-session-selector],
                                                [enable building a custom session selector dialog]),