I have just released APS SDK 1.6.0 including the following enhancements:
- Support for APS 1.11.4
- New Maven profile for purging Docker volumes
Hope to release the next version for supporting APS 2.x, it will be probably tricky due to the introduction of Activiti 7.
Link to my blog post:
https://www.open4dev.com/journal/2021/11/29/released-alfresco-process-services-sdk-160
Hope this helps 
