project: Bump minimum GLib version to 2.72

This is available in Ubuntu 22.04, let's use it.

meson.build

@@ -106,7 +106,7 @@ foreach h : check_headers
   config_h.set(h.get(1), cc.has_header(h.get(0)))
 endforeach
 
-glib_dep = dependency('glib-2.0', version: '>= 2.66')
+glib_dep = dependency('glib-2.0', version: '>= 2.72')
 gio_dep = dependency('gio-2.0')
 gio_unix_dep = dependency('gio-unix-2.0')
 json_glib_dep = dependency('json-glib-1.0')
@@ -160,7 +160,7 @@ if have_libsystemd
   config_h.set('HAVE_LIBSYSTEMD', 1)
 endif
 
-add_project_arguments(['-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_66'], language: 'c')
+add_project_arguments(['-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_72'], language: 'c')
 
 build_documentation = false
 gdbus_codegen = find_program('gdbus-codegen', native: true, required: get_option('documentation'))