ci: run tests with MSRV version

[gdesmott]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.92%. Comparing base (c421e3d) to head (f6d8a48).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #124   +/-   ##
=======================================
  Coverage   90.92%   90.92%           
=======================================
  Files           3        3           
  Lines        2258     2258           
=======================================
  Hits         2053     2053           
  Misses        205      205           

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