[gnome-chess] Trivial: correct meson version.

[Niels De Graef <nielsdg src gnome org>]

commit 7ea9c97c012ef1a32d772d54b43afc29495cd935
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sat Sep 9 10:11:38 2017 +0200

    Trivial: correct meson version.
    
    Patch that was applied came before 3.26.0, so the version still needed
    to be updated.

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 1623bf4..92e881e 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('gnome-chess', [ 'vala', 'c' ],
-  version: '3.25.4',
+  version: '3.26.0',
   license: 'GPL3+',
   meson_version: '>= 0.37',
 )