[libgweather] Bump gtk+ requirement

[Giovanni Campagna <gcampagna src gnome org>]

commit 53c4997034ebed4879af114203195435cbdfe1e8
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Thu Jul 31 15:56:48 2014 +0200

    Bump gtk+ requirement
    
    We need GTK 3.5.6 for GtkSearchEntry, but we really need 3.13.5
    for GtkEntryCompletion::no-matches

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a4a4ec4..469603a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,7 +39,7 @@ AC_SUBST(LIBGWEATHER_VERSION)
 LT_VERSION=8:3:2
 AC_SUBST(LT_VERSION)
 
-GTK_REQUIRED=2.90.0
+GTK_REQUIRED=3.13.5
 GLIB_REQUIRED=2.35.1
 LIBSOUP_REQUIRED=2.34.0
 LIBXML_REQUIRED=2.6.0