- internal changes and small fixes.
- added some default text for rank placeholders (config values 'noname_ph' , 'unknownname_ph' and 'noscore_ph' .
- the change of dragon's 'health' and 'damage' will be ignored now, if this values in config are set to 0.
- the timing for tablist (changing player's name) is configurable now. Config value 'tablist_time'.
- update to 1.19.1

I had no time to test this intensively, so please double check whether everything works as intended
(and report any issues) ...