Upgraded version of gradle-versions-plugin dependency to 0.25.0. (#838)
Upgraded version of gradle-versions-plugin dependency to 0.25.0. (#838)

fixes TweetWallFX/TweetwallFX#837
reinhapa/TweetwallFX,svenreimers/TweetwallFX,fvogler/TweetwallFX,jmichelberger/TweetwallFX,TweetWallFX/TweetwallFX,mklaehn/TweetwallFX