[gnome-builder] build: we actually require 1.18.0

[Christian Hergert <chergert src gnome org>]

commit 27428443e7965bfb71bc65c927023f03034e3955
Author: Christian Hergert <christian hergert me>
Date:   Wed Apr 13 00:47:05 2016 -0700

    build: we actually require 1.18.0

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4440dd2..e8d6008 100644
--- a/configure.ac
+++ b/configure.ac
@@ -179,7 +179,7 @@ m4_define([gobject_introspection_version], [1.47.92])
 m4_define([pygobject_required_version], [3.19.3])
 m4_define([libxml_required_version], [2.9.0])
 m4_define([pangoft2_required_version], [1.38.0])
-m4_define([peas_required_version], [1.17.0])
+m4_define([peas_required_version], [1.18.0])
 
 PKG_CHECK_MODULES(EGG,      [glib-2.0 >= glib_required_version
                              gmodule-2.0 >= glib_required_version