Method tick

src/indicators.hpp:2073–2084

  }

  void tick() {
    {
      std::lock_guard<std::mutex> lock{mutex_};
      const auto type = get_value<details::ProgressBarOption::progress_type>();
      if (type == ProgressType::incremental)
        progress_ += 1;
      else
        progress_ -= 1;
    }
    save_start_time();
    print_progress();
  }

  size_t current() {
    std::lock_guard<std::mutex> lock{mutex_};