Meson build: Use SPDX expression for license

This is the recommended format.
See https://gitlab.freedesktop.org/cairo/cairomm/-/merge_requests/33

diff --git a/meson.build b/meson.build
index 9e6362a..ebf9fab 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@
 
 project('libsigc++', 'cpp',
   version: '3.6.0',
-  license: 'LGPLv2.1+',
+  license: 'LGPL-2.1-or-later',
   default_options: [
     'cpp_std=c++17',
     'warning_level=1',