[gimp] configure.ac: require babl >= 0.1.28 and GEGL >= 0.3.18

[Michael Natterer <mitch src gnome org>]

commit 2d38abd7c442f79f80d808e5b0a5f08466f907e9
Author: Michael Natterer <mitch gimp org>
Date:   Sat Jun 3 18:14:33 2017 +0200

    configure.ac: require babl >= 0.1.28 and GEGL >= 0.3.18

 app/sanity.c |    4 ++--
 configure.ac |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/app/sanity.c b/app/sanity.c
index 2ccd140..c42fcdb 100644
--- a/app/sanity.c
+++ b/app/sanity.c
@@ -453,7 +453,7 @@ sanity_check_babl (void)
 
 #define BABL_REQUIRED_MAJOR 0
 #define BABL_REQUIRED_MINOR 1
-#define BABL_REQUIRED_MICRO 27
+#define BABL_REQUIRED_MICRO 28
 
   babl_get_version (&babl_major_version,
                     &babl_minor_version,
@@ -491,7 +491,7 @@ sanity_check_gegl (void)
 
 #define GEGL_REQUIRED_MAJOR 0
 #define GEGL_REQUIRED_MINOR 3
-#define GEGL_REQUIRED_MICRO 15
+#define GEGL_REQUIRED_MICRO 18
 
   gegl_get_version (&gegl_major_version,
                     &gegl_minor_version,
diff --git a/configure.ac b/configure.ac
index 360d2b0..a24d4e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,8 +43,8 @@ m4_define([gimp_stable],
 m4_define([gimp_full_name], [GNU Image Manipulation Program])
 
 # required versions of other packages
-m4_define([babl_required_version], [0.1.27])
-m4_define([gegl_required_version], [0.3.15])
+m4_define([babl_required_version], [0.1.28])
+m4_define([gegl_required_version], [0.3.18])
 m4_define([glib_required_version], [2.40.0])
 m4_define([atk_required_version], [2.2.0])
 m4_define([gtk_required_version], [2.24.10])