how to install in dev mode?
running `pip install -e .` complains that there is no `setup.py`. What is the recommended procedure?
```
pip install -e .
ERROR: File "setup.py" not found. Directory cannot be installed in editable mode: /Users/kkosack/Projects/CTA/Working/python-project-template
(A "pyproject.toml" file was found, but editable mode currently requires a setup.py based build.)
```
issue