Switch from tenv to usetesting

[dmathieu]

The tenv linter is deprecated in favor of usetesting.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.32%. Comparing base (397d304) to head (2e4b3c2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #718   +/-   ##
=======================================
  Coverage   52.32%   52.32%           
=======================================
  Files          58       58           
  Lines        3490     3490           
=======================================
  Hits         1826     1826           
  Misses       1487     1487           
  Partials      177      177           

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