[librsvg/librsvg-2.40] Bump version to 2.40.21

[Federico Mena Quintero <federico src gnome org>]

commit ef720eeabf6a1bf2bca9b31756398578d75998a6
Author: Federico Mena Quintero <federico gnome org>
Date:   Mon May 7 13:16:09 2018 -0500

    Bump version to 2.40.21

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index e5a5aa5d..568d62d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 m4_define([rsvg_major_version],[2])
 m4_define([rsvg_minor_version],[40])
-m4_define([rsvg_micro_version],[20])
+m4_define([rsvg_micro_version],[21])
 m4_define([rsvg_extra_version],[])
 m4_define([rsvg_version],[rsvg_major_version.rsvg_minor_version.rsvg_micro_version()rsvg_extra_version])
 m4_define([rsvg_lt_version_info],m4_eval(rsvg_major_version + 
rsvg_minor_version):rsvg_micro_version:rsvg_minor_version)