[gxml] Post release version updated to 0.13.0 development

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 3ef19626beba81d4aa12143bf8dab2402ba36403
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue Sep 27 10:52:41 2016 -0500

    Post release version updated to 0.13.0 development

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d1c5973..db020d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@
 
 # Release Version
 m4_define([project_major_version], [0])
-m4_define([project_minor_version], [12])
+m4_define([project_minor_version], [13])
 m4_define([project_micro_version], [0])
 m4_define([project_nano_version], [0])