Fix variable type change in slice4phys for python 3.13 and an XFAIL test condition

[smoia]

• Fix variable type change in slice4phys for python 3.13
• Fix an old XFAIL on test_viz

Closes #

Proposed Changes

Change Type

• bugfix (+0.0.1)
• minor (+0.1.0)
• major (+1.0.0)
• refactoring (no version update)
• test (no version update)
• infrastructure (no version update)
• documentation (no version update)
• other

Checklist before review

• I added everything I wanted to add to this PR.
• [Code or tests only] I wrote/updated the necessary docstrings.
• [Code or tests only] I ran and passed tests locally.
• [Documentation only] I built the docs locally.
• My contribution is harmonious with the rest of the code: I'm not introducing repetitions.
• My code respects the adopted style, especially linting conventions.
• The title of this PR is explanatory on its own, enough to be understood as part of a changelog.
• I added or indicated the right labels.

• I added information regarding the timeline of completion for this PR.

• Please, comment on my PR while it's a draft and give me feedback on the development!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.44%. Comparing base (cc37003) to head (9e7af76).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #491      +/-   ##
==========================================
+ Coverage   91.15%   91.44%   +0.28%     
==========================================
  Files           8        8              
  Lines        1006     1005       -1     
==========================================
+ Hits          917      919       +2     
+ Misses         89       86       -3     

Files with missing lines	Coverage Δ
phys2bids/slice4phys.py	92.10% <100.00%> (ø)
phys2bids/viz.py	98.79% <100.00%> (+3.55%)	⬆️

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[RayStick]

LGTM (in person review)

[RayStick]

@all-contributors add @slugtmeijer for bug fix

[allcontributors]

@RayStick

I've put up a pull request to add @slugtmeijer! 🎉