Fix for Casadi 3.6.2 on Mac

[pariterre]

All Submissions:

• Have you followed the guidelines in our Contributing document [docs/contribution.md]?
• Have you checked to ensure there aren't other open [Pull Requests] for the same update/change?
• Have you opened/linked the issue related to your pull request?
• Have you used the tag [WIP] for on-going changes, and removed it when the pull request was ready?
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New Feature Submissions:

1. Does your submission pass the tests (if not please explain why this is intended)?
2. Did you write a proper documentation (docstrings and ReadMe)
3. Have you linted your code locally prior to submission (using the command: black . -l120 --exclude "external/*")?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new examples for your core changes, as applicable?
• Have you written new tests for your core changes, as applicable?

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This change is 

[codecov]

Codecov Report

Patch coverage: 79.85% and project coverage change: -0.46 ⚠️

Comparison is base (7a9f95f) 81.78% compared to head (3c1fbec) 81.33%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #660      +/-   ##
==========================================
- Coverage   81.78%   81.33%   -0.46%     
==========================================
  Files         112      112              
  Lines       12567    12696     +129     
==========================================
+ Hits        10278    10326      +48     
- Misses       2289     2370      +81     

Impacted Files	Coverage Δ
...imal_control/double_pendulum_torque_driven_IOCP.py	36.20% <0.00%> (-0.87%)	⬇️
bioptim/gui/graph.py	95.18% <ø> (ø)
bioptim/limits/penalty_node.py	35.08% <0.00%> (ø)
bioptim/gui/check_conditioning.py	85.53% <52.38%> (ø)
bioptim/limits/multinode_constraint.py	69.91% <56.52%> (-21.28%)	⬇️
bioptim/limits/objective_functions.py	89.23% <56.52%> (+1.48%)	⬆️
bioptim/limits/penalty_option.py	85.85% <59.45%> (-4.26%)	⬇️
bioptim/limits/constraints.py	81.71% <77.77%> (-1.86%)	⬇️
bioptim/optimization/optimal_control_program.py	86.58% <80.00%> (-0.76%)	⬇️
bioptim/optimization/solution.py	83.65% <83.33%> (ø)
... and 29 more

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