Provide Python3.9 Wheels

[FredHappyface]

Problem description

I'm attempting to install this on Windows as it is a dependency for a program I wish to run however, to install from source Microsoft Visual C++ 14.0 is required.

Would it be possible to provide wheels for this version?

Steps/code/corpus to reproduce

do pip install gensim on Python3.9 Windows 10

Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/   

Versions

Windows-10-10.0.19041-SP0
Python 3.9.2 (tags/v3.9.2:1a79785, Feb 19 2021, 13:44:55) [MSC v.1928 64 bit (AMD64)]
Bits 64
NumPy 1.20.1
SciPy 1.6.1
gensim N/A (attempting to install 3.8.3)

Thanks

[mpenkov]

Related PR: #2966