update CI action

[m-fila]

The testing CI seems to have deprecated dependencies
Also adding dependabot config to get updates automatically in future

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.56%. Comparing base (2502471) to head (7f102d2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   57.45%   58.56%   +1.10%     
==========================================
  Files           4        4              
  Lines         181      181              
==========================================
+ Hits          104      106       +2     
+ Misses         77       75       -2     

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[m-fila]

The tests for linux fail as in #47, which will be fixed by #49