build: Bump required meson version

tests/meson.build

@@ -5,7 +5,7 @@ test_env.set('G_TEST_SRCDIR', meson.current_source_dir())
 test_env.set('G_TEST_BUILDDIR', meson.current_build_dir())
 test_env.set('G_DEBUG', 'gc-friendly,fatal-warnings')
 test_env.set('GSETTINGS_BACKEND', 'memory')
-test_env.set('GSETTINGS_SCHEMA_DIR', '@0@/data'.format(meson.build_root()))
+test_env.set('GSETTINGS_SCHEMA_DIR', '@0@/data'.format(meson.project_build_root()))
 test_env.set('PYTHONDONTWRITEBYTECODE', 'yes')
 test_env.set('MALLOC_CHECK_', '2')
 test_env.set('XDG_CONFIG_HOME', meson.current_source_dir())

tests/services/meson.build

@@ -1,6 +1,6 @@
 service_file = 'org.sigxcpu.Feedback.service'
 service_data = configuration_data()
-service_data.set('ABS_BUILDDIR', meson.build_root())
+service_data.set('ABS_BUILDDIR', meson.project_build_root())
 
 configure_file(
   input : service_file + '.in',