Release 1.2.1.0

This release primarily contains compatibility with Alfresco Content Services (ACS) 7.4 and the switch to Log4j2. It maintains compatibility with previous ACS versions by bridging the differences between the Log4j versions in the affected tooling. The artifacts of the release can be found on Maven Central in both JAR and AMP form (note that for JAR installation, the JARs of dependencies need to be installed separately). A full list of issues and PRs processed for this release can be found via the version milestone overview.