Fixing bbox default value typing

[JoOkuma]

I think we have everything to rework the attributes setup and close #81 and surpass #130

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.02%. Comparing base (e1e715a) to head (e287745).

Files with missing lines	Patch %	Lines
src/tracksdata/nodes/_regionprops.py	66.66%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #186      +/-   ##
==========================================
- Coverage   88.10%   88.02%   -0.08%     
==========================================
  Files          50       50              
  Lines        3472     3474       +2     
  Branches      601      601              
==========================================
- Hits         3059     3058       -1     
- Misses        248      250       +2     
- Partials      165      166       +1     

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