Update tox.ini

[emmanvg]

Make the calls os-agnostic

Fails when testing locally, should not affect GitHub Actions

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Merging #138 (53b7401) into master (66689d9) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #138   +/-   ##
=======================================
  Coverage   94.56%   94.56%           
=======================================
  Files          20       20           
  Lines         828      828           
=======================================
  Hits          783      783           
  Misses         45       45           

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