Method detach

lib/tiny-process/process_win.cpp:24–28

      CloseHandle(handle);
  }
  HANDLE detach() noexcept {
    HANDLE old_handle = handle;
    handle = INVALID_HANDLE_VALUE;
    return old_handle;
  }
  operator HANDLE() const noexcept { return handle; }
  HANDLE *operator&() noexcept { return &handle; }