`typing.TypedDict` documentation doesn't list minimum version for `__required_keys__` and `__optional_keys__`

[finite-state-machine]

Documentation

The TypeDict class exposes attributes __required_keys__ and __optional_keys__ starting in Python 3.9, but the documentation doesn't list the minimum version for these features, implying that they're available in Python 3.8.

c.f. https://github.com/python/cpython/blob/main/Doc/library/typing.rst near line 1827.

[finite-state-machine]

This appears to be resolved:
https://docs.python.org/3.10/library/typing.html