[evolution-mapi] Bug 775363 - Bump minimum CMake version to 3.1

[Milan Crha <mcrha src gnome org>]

commit 5cfc81312e100940b07d6b26e8ac9660fb53e4c6
Author: Milan Crha <mcrha redhat com>
Date:   Thu Dec 1 11:13:35 2016 +0100

    Bug 775363 - Bump minimum CMake version to 3.1
    
    That's to keep in sync with the evolution-data-server and evolution,
    where the bump was done due to usage of 'cmake -E env', which had
    been added in the CMake 3.1.

 CMakeLists.txt |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d32039d..45c773c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Evolution-MAPI build script
 
-cmake_minimum_required(VERSION 3.0)
-cmake_policy(VERSION 3.0)
+cmake_minimum_required(VERSION 3.1)
+cmake_policy(VERSION 3.1)
 
 project(evolution-mapi
        VERSION 3.23.3