fix older msvc(19.36) compilation error

[toge]

In 0.8.0.0 and 0.9.0, I met a compilation error on older msvc(19.36) followings:

include\rfl\parsing\NamedTupleParser.hpp(99,51): error C2653: 'T': is not a class or namespace name [test_package.vcxproj]
include\rfl\parsing\NamedTupleParser.hpp(90,23): message : This diagnostic occurred in the compiler generated function 'rfl::parsing::schema::Type rfl::parsing::NamedTupleParser<R,W,_ignore_empty_containers,_all_required,FieldTypes...>::to_schema(std::map<std::string,rfl::parsing::schema::Type,std::less<std::string>,std::allocator<std::pair<const std::string,rfl::parsing::schema::Type>>> 

I confirmed it is caused by the line in NamedTupleParser.hpp.

using F = std::tuple_element_t<_i, typename T::Fields>;

This PR try to fix this compilation error.

Please review and merge it if possible.

[liuzicheng1987]

Cool, thank you so much.

[liuzicheng1987]

@toge the code changes look good, of course, and the Github Actions pipelines run through as well. So I am going to merge this. Thank you so much for your contribution!

It is really weird, though, that this should be a problem in the first place...

[stan1334]

parentcmakefile：
add_subdirectory(reflect-cpp) # Add this project as a subdirectory

set(REFLECTCPP_BSON OFF) # Optional
set(REFLECTCPP_CBOR OFF) # Optional
set(REFLECTCPP_FLEXBUFFERS OFF) # Optional
set(REFLECTCPP_MSGPACK OFF) # Optional
set(REFLECTCPP_TOML OFF) # Optional
set(REFLECTCPP_XML OFF) # Optional
set(REFLECTCPP_YAML OFF) # Optional

add_executable(${PROJECT_NAME}
${HEADER_FILES}
${SOURCE_FILES}
)

target_link_libraries(${PROJECT_NAME}
PRIVATE
reflectcpp
) # Link against the library

cl.exe 19.29.30148.0

builderror：

[build] D:\repos\integrate\src\datalog\src\tools\examples\reflect-cpp\include\rfl\parsing\NamedTupleParser.hpp(201): error C2653: 'F': is not a class or namespace name
[build] D:\repos\integrate\src\datalog\src\tools\examples\reflect-cpp\include\rfl\parsing\NamedTupleParser.hpp(192): note: This diagnostic occurred in the compiler generated function 'void rfl::parsing::NamedTupleParser<R,W,_ignore_empty_containers,_all_required,_no_field_names,ProcessorsType,FieldTypes...>::build_schema(std::map<std::string,rfl::parsing::schema::Type,std::lessstd::string,std::allocator<std::pair<const std::string,rfl::parsing::schema::Type>>> *,conditional<_no_field_names,rfl::parsing::schema::Type::Tuple,rfl::parsing::schema::Type::Object>::type *,std::integer_sequence<int,_is...>) noexcept'
[build] D:\repos\integrate\src\datalog\src\tools\examples\reflect-cpp\include\rfl\parsing\NamedTupleParser.hpp(283): note: see reference to class template instantiation 'rfl::parsing::NamedTupleParser<R,W,_ignore_empty_containers,_all_required,_no_field_names,ProcessorsType,FieldTypes...>' being compiled
[build] ninja: build stopped: subcommand failed.

reflect-cpp版本0.12.0

@liuzicheng1987