Fix building with Meson inside Debian build tool

meson.build

@@ -1,6 +1,6 @@
 project('cobang',
         version: '0.6.3',
-        meson_version: '>= 0.50.0',
+        meson_version: '>= 0.54',
         default_options: [
           'warning_level=2',
         ],
@@ -12,24 +12,12 @@ i18n = import('i18n')
 pymod = import('python')
 
 python = pymod.find_installation('python3')
-pythonver = python.language_version()
-# Workaround for https://github.com/mesonbuild/meson/issues/5629
-# https://gitlab.freedesktop.org/gstreamer/gst-python/issues/28
-python_dep = dependency('python-@0@-embed'.format(pythonver), version: '> 3.7', required: false)
-
-# Make sure Python is installed and found
-if not python_dep.found()
-  python_dep = python.dependency(version: '>= 3.7')
-endif
+python_dep = python.dependency(embed:true, required : true)
 
 dependency('glib-2.0')
 dependency('gobject-2.0')
 dependency('gobject-introspection-1.0')
 dependency('gtk+-3.0', version: '>=3.24')
-dependency('libnm', version: '>= 1.22')
-
-gst_dep = dependency('gstreamer-1.0', version : '>= 1.16',
-  fallback : ['gstreamer', 'gst_dep'])
 
 conf = configuration_data()
 conf.set('PYTHON', python.path())