message: Add a parsing item from the 1.20 test save
diff: @@ -81,6 +81,7 @@ EU4::world::world(const string& EU4SaveFileName)
  );
  registerKeyword(std::regex("multi_player"), commonItems::ignoreString);
  registerKeyword(std::regex("not_observer"), commonItems::ignoreString);
  + registerKeyword(std::regex("players_countries"), commonItems::ignoreObject);
  registerKeyword(std::regex("campaign_id"), commonItems::ignoreString);
  registerKeyword(std::regex("campaign_length"), commonItems::ignoreString);
  registerKeyword(std::regex("campaign_stats"), commonItems::ignoreObject);
  