PyYAML>=5.4.1

[dev]
bump2version>=1.0.1
black>=21.9b0
pytest>=6.1.2
pytest-cov>=3.0.0
pytest-flake8>=1.0.7
pytest-isort>=2.0.0
pytest-mypy>=0.8.1
types-PyYAML>=5.4.11
