Consider adding sphinx-autodoc-typehints to requirements.txt

[stevepiercy]

@pauleveritt suggests the use of sphinx-autodoc-typehints to auto-document docstrings and typehints. In addition to the nice formatting, the return type of one class can be hyperlinked to another in the documentation.

See tutorial and updated code samples

[pauleveritt]

As a further point, it lessens the work as the docstring doesn't have to repeat type hint information for parameters.

[stevepiercy]

Of course, for this extension to be of any use, Plone code needs to use typehints. I have no idea if that has been or is being done.