Method err_code

include/ylt/struct_pack/error_code.hpp:50–50

 public:
  errc ec;
  constexpr err_code() noexcept : ec(errc::ok) {}
  constexpr err_code(errc ec) noexcept : ec(ec){};
  constexpr err_code& operator=(errc ec) noexcept {
    this->ec = ec;