Method version

include/BS_thread_pool.hpp:145–145

struct [[nodiscard]] version
{
    constexpr version(const std::uint64_t major_, const std::uint64_t minor_, const std::uint64_t patch_) noexcept : major(major_), minor(minor_), patch(patch_) {}

// In C++20 and later we can use the spaceship operator `<=>` to automatically generate comparison operators. In C++17 we have to define them manually.
#ifdef __cpp_impl_three_way_comparison