Class cwd

cpp-subprocess/subprocess.hpp:866–871

! * Option to set the current working directory * of the spawned process. * * Eg: cwd{"/some/path/x"} */

 * Eg: cwd{"/some/path/x"}
 */
struct cwd
{
  explicit cwd(const platform_str_t &cwd): cwd_(cwd) {}
  explicit cwd(platform_str_t &&cwd): cwd_(std::move(cwd)) {}
  platform_str_t cwd_;
};

/*!
 * Option to specify environment variables required by