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: I10b63607dc6ce913e64d1058ff06b6e7daab44ea
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
1 file changed