Enable WSL on GitHub Actions

[hyrodium]

As discussed in #45, it would be better to add tests on WSL.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.72%. Comparing base (565d0e6) to head (618c88c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage   80.72%   80.72%           
=======================================
  Files           5        5           
  Lines          83       83           
=======================================
  Hits           67       67           
  Misses         16       16           

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