Request to support for Python 3.9

Currently latest release of TuriCreate 6.4.1 does not support python 3.9.

Support versions are documented as 1) Python 2.7, 3.5, or 3.6, 2) Python 3.7 macOS only here: https://pypi.org/project/turicreate/

Are there any plans to support Python 3.9 in upcoming releases?