[FEATURE] Test Package is installing on Python 3.9 via GitHub Actions

[neomatrix369]

Missing functionality

At the moment we are not sure if the NLP Profiler will work perfectly fine using python 3.9 - and it would be good to have support for 3.9 to start with as we have phased out 3.6 (due to one or more dependencies not supporting Python 3.6).

Proposed feature

Create a Github action directive (pipeline) for Python 3.9 just like we have for Python 3.7 and 3.8.

Alternatives considered
N/A

Additional context
N/A