updates checkstyle and our corresponding code check configuration to the newest version
todo:
-
wait for eclipse plugin support for 8.41.1: https://github.com/checkstyle/eclipse-cs/issues/282 -
suggestion by @rafael (in chat): configure checkstlye as execution goal in verify phase, so the eclipse plugin can auto-detect settings -
clarify if it's OK to skip mvn cleanin the Reports stage.