[PyQt] PyQt5-5.8.1 wheel does not install on macOS for python3.6

[Thomas Vincent]

Hi,

I could not install PyQt5-5.8.1 wheel on MacOS for Python3.6.

This seems to come from the sip requirement in the wheel METADATA file:

In previous PyQt5 macOS wheel (version 5.8) it contains: "Requires-Dist: 
sip (>=4.19.1)".
Whereas in PyQt5-5.8.1 macOS wheel it contains: "Requires-Dist: sip 
(4.19)" which is not available for python3.6 on MacOS.
Is this change to an older version of sip on purpose, or can the new 
version of PyQt5 use sip >=4.19.1 as well so it would work for 
python3.6?

Best Regards,
    Thomas VINCENT