Needs to compile with `CMAKE_OSX_DEPLOYMENT_TARGET` of 10.14 at least to have `std::optional<>::value()` available. So we have to increase the minimum required compiler version, but that requires more changes. Just fix the build error for now.
Needs to compile with `CMAKE_OSX_DEPLOYMENT_TARGET` of 10.14 at least to have `std::optional<>::value()` available. So we have to increase the minimum required compiler version, but that requires more changes. Just fix the build error for now.