20.3.0
Move test helpers into an utils module
Refactor Hypothesis strategy for self-tests (#706)
Add attr.resolve_types (#302)
Check type of set_run_validators' arg
Rename converters.chain to converters.pipe
pre-commit autoupdate
Fade to Black (#392)
Treat frozensets like sets in asdict/astuple (#704)
Ensure objects live long enough in hash test
Attribute.assoc → evolve
Be consistent in calling slotted classes slotted
[RFC] kw_only python 2 backport (#700)
Fix exception chaining on PyPy (#712)
Don't reset custom __setattr__ in slotted classes (#681)
Add control to generate __[sg]etstate__ (#642)
Make `zope` a semi-optional test dependency (#685)
Rename _version.py into _version_info.py
Tighten up mypy configuration
Fix attribute collection (#635)