Update DataStructures to v0.19

[blegat]

No description provided.

[schillic]

Could you try again, now that SymbolicWedderburn was updated?

[blegat]

You need to apply your changes to the release-0.7 branch

[schillic]

There is another occurrence of IntDisjointSets on this branch here that should be renamed to IntDisjointSet.

[schillic]

I guess this was a merge error. On my branch, I did that change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.86%. Comparing base (512b9a4) to head (ac06229).

Additional details and impacted files

@@             Coverage Diff              @@
##           release-0.7     #406   +/-   ##
============================================
  Coverage        61.86%   61.86%           
============================================
  Files               37       37           
  Lines             2116     2116           
============================================
  Hits              1309     1309           
  Misses             807      807           

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