black==20.8b1
doc8==0.8.1
coveralls==3.0.1
flake8==3.9.1
flake8-commas==2.0.0
flake8-comprehensions==3.4.0
flake8-docstrings==1.6.0
flake8-isort==4.0.0
flake8-mutable==1.2.0
freezegun==1.1.0
isort==5.8.0
mypy==0.812
pydocstyle==6.0.0
pytest==6.2.3
pytest-cov==2.11.1
rope==0.19.0
setuptools==56.0.0
sphinx==3.5.4
sphinx-autodoc-typehints==1.12.0
twine==3.4.1
wheel==0.36.2

black==21.4b0
doc8==0.8.1
coveralls==3.0.1
flake8==3.9.1
flake8-commas==2.0.0
flake8-comprehensions==3.4.0
flake8-docstrings==1.6.0
flake8-isort==4.0.0
flake8-mutable==1.2.0
freezegun==1.1.0
isort==5.8.0
mypy==0.812
pydocstyle==6.0.0
pytest==6.2.3
pytest-cov==2.11.1
rope==0.19.0
setuptools==56.0.0
sphinx==3.5.4
sphinx-autodoc-typehints==1.12.0
twine==3.4.1
wheel==0.36.2

Bump black from 20.8b1 to 21.4b0
Bump black from 20.8b1 to 21.4b0

Bumps [black](https://github.com/psf/black) from 20.8b1 to 21.4b0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/master/CHANGES.md)
- [Commits](https://github.com/psf/black/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>