* Preserve AttributeError in slotted classes with cached_property
In slotted classes' generated __getattr__(), we try __getattribute__()
before __getattr__(), if available, and eventually let AttributeError
propagate. This matches better with the behaviour described in Python's
documentation "Customizing attribute access":
https://docs.python.org/3/reference/datamodel.html#customizing-attribute-access
Fix https://github.com/python-attrs/attrs/issues/1230
* Update changelog.d/1253.change.md
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Co-authored-by: Hynek Schlawack <hs@ox.cx>
Denis Laxalde