v0.3.1

pip install deckflow-core==0.3.1

Or without touching a virtualenv — this works on a PEP 668
externally-managed interpreter:

python3 -m pip install --target ~/.deckflow/core/0.3.1 deckflow-core==0.3.1
PYTHONPATH=~/.deckflow/core/0.3.1 python3 -m deckflow_core env check