[evolution] Post-release version bump

[Milan Crha <mcrha src gnome org>]

commit 25b95bdd180ddda00bdca29a7b4eb9d9416db5ed
Author: Milan Crha <mcrha redhat com>
Date:   Mon Aug 15 12:40:26 2016 +0200

    Post-release version bump

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5439429..9ccfcfe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 dnl Evolution Versions
 m4_define([evo_major_version], [3])
 m4_define([evo_minor_version], [21])
-m4_define([evo_micro_version], [90])
+m4_define([evo_micro_version], [91])
 m4_define([evo_version],
        [evo_major_version.evo_minor_version.evo_micro_version])
 m4_define([evo_stable_version],