build(build-system): Include setuptools to allow "pip install -e ."

Author: tony

pyproject.toml

@@ -81,5 +81,5 @@ format = ["black", "isort"]
 lint = ["flake8"]
 
 [build-system]
-requires = ["poetry_core>=1.0.0"]
+requires = ["poetry_core>=1.0.0", "setuptools>50"]
 build-backend = "poetry.core.masonry.api"