Update setup.cfg

[dwighthubbard]

Update the python_requires.

I confirm that this contribution is made under the terms of the license found in the root directory of this repository's source tree and that I have the authority necessary to make this contribution on behalf of its copyright owner.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.10%. Comparing base (852ceca) to head (7a2501b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #49      +/-   ##
==========================================
- Coverage   79.32%   79.10%   -0.22%     
==========================================
  Files           6        6              
  Lines         295      292       -3     
  Branches       35       35              
==========================================
- Hits          234      231       -3     
  Misses         47       47              
  Partials       14       14              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.