Changes to support python 3.10

[aamster]

• Update python versions that github actions tests to 3.8 - 3.10
• Update setup.py to list supported python versions to 3.8 - 3.10
• Remove upper bound on matplotlib install which failed on windows/py310
• Remove upper bound on pytest which failed on py310

[aamster]

No, we can do that once we release