Support of python3.9

[masfaraud]

Hello, When installing the package with pip on python3.9, it works but the importing fails:

Python 3.9.0+ (default, Oct 20 2020, 08:43:38) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import netifaces
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'netifaces'

Does netifaces support python3.9?