fix NamedTupleParser::to_schema() for non-DefaultVal fields - #730

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/github-script@v7, ilammy/msvc-dev-cmd@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\generic\reflect-cpp-generic-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\generic\reflect-cpp-generic-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\generic\reflect-cpp-generic-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\generic\reflect-cpp-generic-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\generic\reflect-cpp-generic-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\json\reflect-cpp-json-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\env\reflect-cpp-env-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\json_c_arrays_and_inheritance\reflect-cpp-json-c-arrays-and-inheritance-tests.vcxproj]

The contents of <expected> are available only with C++23 or later. [D:\a\reflect-cpp\reflect-cpp\build\tests\cli\reflect-cpp-cli-tests.vcxproj]