[CHANGE] Update tox settings

[ppfeufer]

Description

Changed

• Update tox settings

Type of Change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (master@b78555d). Learn more about missing BASE report.
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #460   +/-   ##
=========================================
  Coverage          ?   99.27%           
=========================================
  Files             ?       28           
  Lines             ?     1227           
  Branches          ?       80           
=========================================
  Hits              ?     1218           
  Misses            ?        1           
  Partials          ?        8           

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