[gnome-dictionary] Bump up the dependency on GLib and GTK+

[Emmanuele Bassi <ebassi src gnome org>]

commit bb08b090f50802ae47c5882ae683c2378a7cc589
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Aug 31 16:49:18 2016 +0100

    Bump up the dependency on GLib and GTK+

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index cd75fd0..cebe5f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -159,8 +159,8 @@ GTK_DOC_CHECK([1.15], [--flavour no-tmpl])
 
 YELP_HELP_INIT
 
-GLIB_MIN_VERSION=2.39.0
-GTK_MIN_VERSION=3.16
+GLIB_MIN_VERSION=2.42.0
+GTK_MIN_VERSION=3.21.1
 
 PKG_CHECK_MODULES(GDICT,
                   glib-2.0 >= $GLIB_MIN_VERSION