* maintainer changed to PharmAI GmbH
* full compatibility to Python 3 and OpenBabel 3
* Docker and Singularity support, Deployment to Docker Hub
* dropped support for OpenBabel 2, Python 2
* reorganization of modules
* migrates to proper logging pattern
* code quality enhancements
* adds option to disable non-deterministic protonation of structures (`--nohydro`)
* protonated structures are now stored to guarantee consistent interaction detection
* new options to change verbosity levels
* bug fixes in code and deployment
* multi-architecture builds on https://hub.docker.com/r/pharmai/plip
* Docker build for Ubuntu 20.04 LTS