Update atomref

[MatthieuDartiailh]

@frmdstryr I took the liberty to open the PR, because I think it is less controversial than the sortedmap and dict changs and it makes sense to include it in the next release.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.52%. Comparing base (2f8fd13) to head (775807f).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #275   +/-   ##
=======================================
  Coverage   97.52%   97.52%           
=======================================
  Files          24       24           
  Lines        1093     1093           
  Branches      167      167           
=======================================
  Hits         1066     1066           
  Misses         13       13           
  Partials       14       14           

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[frmdstryr]

Thanks! I don't remember why I didn't open a request.