[glade] Python plugin: Fix build against Python 3.9

[Juan Pablo Ugarte <jpu src gnome org>]

commit ba3bc86d54524af38f3ff6790f198633a5821fb9
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Mon Nov 9 17:35:04 2020 +0000

    Python plugin: Fix build against Python 3.9
    
    This basically reverts 6f4fb5672f41201a20e0f879a7d7d7b96f045425,
    returning to Meson's `python` module, since the `python-3.8-embed`
    dependency obviously only works with Python 3.8.
    
    We're using the `embed` kwarg which was added in Meson 0.53.0, so we
    need to bump the minimum `meson_version`.

 meson.build | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/meson.build b/meson.build
index 90d8ffc8..3b6b9a01 100644
--- a/meson.build
+++ b/meson.build
@@ -11,7 +11,7 @@ project(
   version: '3.39.0',
   license: 'GPL2',
   default_options: 'buildtype=debugoptimized',
-  meson_version: '>= 0.49.0',
+  meson_version: '>= 0.53.0',
 )
 
 glade_name = meson.project_name()
@@ -153,7 +153,7 @@ pygobject_version = '3.8.0'
 pygobject_dep = dependency('pygobject-3.0', version: '>= ' + pygobject_version, required: 
get_option('python'))
 have_python = pygobject_dep.found()
 if have_python
-  python_dep = dependency('python-3.8-embed', version: '>= 3.8')
+  python_dep = import('python').find_installation().dependency(embed: true)
 
   version_array = pygobject_version.split('.')
   config_h.set('PYGOBJECT_REQUIRED_MAJOR', version_array[0].to_int())