[at-spi2-core] Up meson requirement

[Mike Gorse <mgorse src gnome org>]

commit 83c2c4619076bd4cf1c98aa33de6670b33a738cd
Author: Mike Gorse <mgorse alum wpi edu>
Date:   Mon Sep 2 10:29:24 2019 -0500

    Up meson requirement

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 9939180..5c0c9a7 100644
--- a/meson.build
+++ b/meson.build
@@ -6,7 +6,7 @@ project('at-spi2-core', 'c',
           'warning_level=1',
           'c_std=c99',
         ],
-        meson_version: '>= 0.40.1')
+        meson_version: '>= 0.50.0')
 
 add_project_arguments([ '-D_POSIX_C_SOURCE=200809L', '-D_DEFAULT_SOURCE' ], language: 'c')