[gtk+] build: Depend on Meson 0.40 at least

[Emmanuele Bassi <ebassi src gnome org>]

commit ea32f4c020ed64e5957944f642ec0639b882cf00
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Fri Apr 28 15:49:00 2017 +0100

    build: Depend on Meson 0.40 at least

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 153f135..d88ddd4 100644
--- a/meson.build
+++ b/meson.build
@@ -5,7 +5,7 @@ project('gtk+-4.0', 'c',
           'warning_level=1',
           'c_std=c99',
         ],
-        meson_version : '>= 0.39.1',
+        meson_version : '>= 0.40.0',
         license: 'LGPLv2.1+')
 
 glib_major_req = 2