Upgraded version of log4j dependencies to 2.13.0.
Upgraded version of log4j dependencies to 2.13.0.

fixes TweetWallFX/TweetwallFX#965

mklaehn/TweetwallFX,svenreimers/TweetwallFX,reinhapa/TweetwallFX,TweetWallFX/TweetwallFX,fvogler/TweetwallFX,jmichelberger/TweetwallFX