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: I05293cb1d160ff3d11907421c2904e36cde0349d
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meson.build b/meson.build
index 5a7f4e4..ba7f23a 100644
--- a/meson.build
+++ b/meson.build
@@ -1,12 +1,12 @@
 project('phosphor-psu-code-mgmt', 'cpp',
-        version: '0.1', meson_version: '>=0.49.0',
+        version: '0.1', meson_version: '>=1.1.1',
         default_options: [
           'warning_level=3',
           'werror=true',
-          'cpp_std=c++20',
+          'cpp_std=c++23',
           'b_lto=true',
         ],
-        meson_version: '>=0.58.0',
+        meson_version: '>=1.1.1',
        )
 
 systemd = dependency('systemd')