[PyQt] PEP 484 stub files in wheels? (whl)

[Kyle Altendorf]

I did a quick search and didn't find discussion of PEP 484 stubs as 
related to wheels.  At least in Linux the 5.7.0 and 5.8.2 wheels do not 
seem to install any .pyi files.  Is this intentional?  Could they be 
included?

This came up in #pyqt after a question about PyCharm claiming that 
`flags` was a required parameter for QWidget() because it misinterpreted 
the docstring.  This also relates to 
https://youtrack.jetbrains.com/issue/PY-16818.

Cheers,
-kyle