attrs
cached-property
click
six
packaging

[:python_version < "3.5"]
pathlib2

[:python_version == "2.7"]
backports.functools_lru_cache

[dev]
parver
wheel>=0.33.4
invoke
twine
lxml
pre-commit
towncrier

[tests]
pytest
pytest-cov
pytest-timeout
coverage<5
