Update typing

[gerlero]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 70.96774% with 18 lines in your changes missing coverage. Please review.

Project coverage is 86.96%. Comparing base (06a2e7b) to head (d8fad94).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
foamlib/_files/_files.py	72.72%	12 Missing ⚠️
foamlib/_files/_serialization.py	64.28%	5 Missing ⚠️
foamlib/_files/_util.py	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #249      +/-   ##
==========================================
- Coverage   87.42%   86.96%   -0.46%     
==========================================
  Files          16       16              
  Lines        1288     1297       +9     
==========================================
+ Hits         1126     1128       +2     
- Misses        162      169       +7     

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