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: Ie0245d2667cfb2917e1af6d57f82a1d20fef8d60
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
1 file changed