1.3.0

BREAKING v1.3.0 CHANGE: std::pair is now handled as a JSON object ({"first":second}}. If you require a JSON array of two items, use std::array or std::tuple.

Removed MSVC 2019 support (the compiler has too many limitations for ranges and compile time logic)

• Added numeric enum support (default behavior)
• std::string reading with CSV format
• Added separate concepts for readable_map_t and writable_map_t (thanks @justend29)
• Views and ranges of std::pair can now be serialized as objects: (thanks @justend29)

auto num_view =
std::views::iota(-2, 3) | std::views::transform([](const auto i) { return std::pair(i, i * i); });
expect(glz::write_json(num_view) == glz::sv{R"({"-2":4,"-1":1,"0":0,"1":1,"2":4})"});

• Added glz::invoke and glz::invoke_update, which allow invoking functions when reading JSON input
• Added GLZ_QUOTED_X helper macro (thanks @pwqbot)