Bump sympy in CI

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.77%. Comparing base (4c6efe8) to head (a4bfed2).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #493      +/-   ##
==========================================
- Coverage   78.03%   77.77%   -0.27%     
==========================================
  Files          17       17              
  Lines        4193     4193              
==========================================
- Hits         3272     3261      -11     
- Misses        921      932      +11     

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[utensil]

SymPy 1.9: powers with negative signs in the exponent are now printed in the denominator

which also changed the order.

[utensil]

SymPy 1.10: this is the version that changes the behaviors related to the negative signs as reported by #489 .

No corresponding change log can be confirmed after searching for "sign", "neg" etc.

Another issue in this version is reported as #494 .

[utensil]

SymPy 1.11:

• extra {} after begin{array} in the LaTeX, see b467621 which is "Fixed a bug with Array printing" in the release note
• Broken MatrixFunction since SymPy 1.11 #495 which is introduced by "Function subclasses now raise an exception if the eval method is not defined as a @classmethod" in the release note.

[utensil]

SymPy 1.12: no extra hassle.

All CI green. The coverage drop is due to the temporary removal of gsym-printing.ipynb. Merging.