[lightsoff] Fixed meson version requirement warning

[Robert Roth <robertroth src gnome org>]

commit a0f5fee3076e62d79b043970a17b6256334f28a2
Author: Robert Roth <robert roth off gmail com>
Date:   Tue Jan 12 11:38:00 2021 +0200

    Fixed meson version requirement warning

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 89486df..a612c8e 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('lightsoff', ['c','vala'],
        version: '40.beta',
-       meson_version: '>= 0.43.0',
+       meson_version: '>= 0.50.0',
        license: 'GPLv2+'
 )