Add compat entries for stdlib packages

[sethaxen]

Now required by the general registry: https://discourse.julialang.org/t/psa-compat-requirements-in-the-general-registry-are-changing/104958

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c1a4c33) 89.66% compared to head (d782113) 89.66%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #162   +/-   ##
=======================================
  Coverage   89.66%   89.66%           
=======================================
  Files          13       13           
  Lines         590      590           
=======================================
  Hits          529      529           
  Misses         61       61           

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