Axom codevelop build problem on mac

[btalamini]

Since the switch to c++20, building Smith on my Mac fails due to a non-compliant c++20 problem in Axom, in particular with sol.

[chapman39]

i am able to reproduce the issue, ill come up with a fix soon

In file included from /Users/chapman39/dev/lido-2.0/repo/smith_cz/smith/axom/src/axom/inlet/LuaReader.cpp:25:
/Users/chapman39/dev/lido-2.0/repo/smith_cz/smith/axom/src/thirdparty/axom/sol.hpp:14498:71: error: no template named 'result_of_t' in namespace 'std'
 14498 |                 template <typename R, typename... Args, typename F, typename = std::result_of_t<meta::unqualified_t<F>(Args...)>>
       |                                                                                ~~~~~^
/Users/chapman39/dev/lido-2.0/repo/smith_cz/smith/axom/src/thirdparty/axom/sol.hpp:14522:61: error: no template named 'result_of_t' in namespace 'std'
 14522 |                 template <typename... Args, typename F, typename R = std::result_of_t<F&(Args...)>>
       |                                                                      ~~~~~^
/Users/chapman39/dev/lido-2.0/repo/smith_cz/smith/axom/src/thirdparty/axom/sol.hpp:20655:86: error: no template named 'result_of_t' in namespace 'std'
 20655 |                 template <typename R, typename... Args, typename Fx, typename Key, typename = std::result_of_t<Fx(Args...)>>
       |                                                                                               ~~~~~^

[white238]

llnl/axom#1840

[white238]

This has been merged in axom@develop. We just need to update Axom.