Changes

Summary

1. add placeholder for session duration (commit: cd6c17b) (details)

Commit cd6c17bea5d5cfc43a8cdf166bbfa3ae52e05960 by Flo.e3 add placeholder for session duration (commit: cd6c17b)
	data/core/src/main/java/codecrafter47/bungeetablistplus/data/DataKeys.java (diff)
	bungee/src/main/java/codecrafter47/bungeetablistplus/player/ConnectedPlayer.java (diff)
	bungee/src/main/java/codecrafter47/bungeetablistplus/placeholder/Placeholder.java (diff)
	bungee/src/main/java/codecrafter47/bungeetablistplus/managers/DataManager.java (diff)