Release 2.12: * upgrade checkstyle version to 8.44 * upgrade pmd version to 6.36.0 * upgrade spotbugs version to 4.3.0
Release 2.11: * upgrade checkstyle dependency to 8.41.1 * fix bug in Jenkingsfile: maven dependency upgrade notifications fail when none are found
Release 2.10 Changes: * add timeout for Jenkins pipeline run * define maven version to be >= 3.6 * integrate spotbugs, surefire, pmd, sonar into maven build and report plugins * update maven plugins * add custom checkstyle rule: avoid trailing whitespace