[atk] build: Bump up dependency on Meson

[Emmanuele Bassi <ebassi src gnome org>]

commit 785e609e38a90123abf47eb15c9923ad68114e6a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Jun 19 14:40:27 2018 +0100

    build: Bump up dependency on Meson
    
    Version 0.40.1 is ancient history.
    
    Use 0.46.0, as we're going to need some new features.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 51f5f5d..5f68bcf 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@ project('atk', 'c',
           'warning_level=1',
           'c_std=c99',
         ],
-        meson_version : '>= 0.40.1')
+        meson_version : '>= 0.46.0')
 
 cc = meson.get_compiler('c')
 host_system = host_machine.system()