* Remove Python 3.7 and 3.8 from github actions workflows
* Update lockfile after running poetry update a couple times
* Update poetry lock
* Remove Python 3.7 and 3.8 from pyproject.toml and run poetry lock
* Switch from pyyaml to ruamel.yaml
* Remove duplicate editor key in config
* Use ruamel.yaml instead of pyyaml in legacy template.py
* Prevent ruamel from collapsing config YAML
* Run make format