build: upgrade to C++23

Meson 1.1.1 and GCC-13 both support C++23 and a sufficient portion of
the standard has been implemented.  Upgrade the build to leverage it.

Change-Id: I7bb2188a9627a7390574e8d930bec671c15205f1
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meson.build b/meson.build
index a6bd6c7..be9b03a 100644
--- a/meson.build
+++ b/meson.build
@@ -1,8 +1,8 @@
 project('phosphor-dbus-interfaces', 'cpp',
-    meson_version: '>= 0.58.0',
+    meson_version: '>=1.1.1',
     default_options: [
         'buildtype=debugoptimized',
-        'cpp_std=c++20',
+        'cpp_std=c++23',
         'warning_level=3',
         'werror=true',
         'generate_md=' + (meson.is_subproject() ? 'false' : 'true'),