[gnome-characters] meson: Update to 0.59

[Christopher Davis <christopherdavis src gnome org>]

commit 1e74239cd922cc997d6a97d57e21320ef5d2f24f
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Fri Feb 18 15:32:56 2022 +0100

    meson: Update to 0.59

 meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index d9f24f6..20cc44d 100644
--- a/meson.build
+++ b/meson.build
@@ -3,7 +3,7 @@ project(
   version: '42.0',
   license: ['BSD-3-Clause', 'GPL-2.0-or-later'],
   default_options: 'buildtype=debugoptimized',
-  meson_version: '>= 0.46.0'
+  meson_version: '>= 0.59.0'
 )
 
 if get_option('profile') == 'development'
@@ -61,7 +61,7 @@ endif
 gnome = import('gnome')
 i18n = import('i18n')
 
-po_dir = join_paths(meson.source_root(), 'po')
+po_dir = join_paths(meson.project_source_root(), 'po')
 
 top_inc = include_directories('.')