Improvements to types

[lukasz-migas]

Description

Related Issue

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've read the CODE_OF_CONDUCT.md document.
• I've read the CONTRIBUTING.md guide.
• I've updated the code style using make codestyle.
• I've written tests for all new methods and classes that I created.
• I've written the docstring in Google format for all the methods and classes that I used.

[codecov]

Codecov Report

Merging #30 (7b77b1e) into main (62b4b3b) will decrease coverage by 0.34%.
Report is 6 commits behind head on main.
The diff coverage is 87.44%.

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
- Coverage   71.23%   70.90%   -0.34%     
==========================================
  Files          18       18              
  Lines        1502     1526      +24     
==========================================
+ Hits         1070     1082      +12     
- Misses        432      444      +12     

Files	Coverage Δ
src/imzy/_readers/bruker/utilities.py	21.73% <100.00%> (+3.55%)	⬆️
src/imzy/_readers/imzml/_ontology.py	35.29% <100.00%> (+1.29%)	⬆️
src/imzy/hookspec.py	88.88% <100.00%> (ø)
src/imzy/_extract.py	93.00% <86.66%> (-1.24%)	⬇️
src/imzy/_readers/bruker/_mixin.py	88.75% <93.10%> (-0.53%)	⬇️
src/imzy/_readers/_base.py	82.94% <87.50%> (-0.62%)	⬇️
src/imzy/_readers/imzml/_imzml.py	57.79% <84.84%> (-0.12%)	⬇️
src/imzy/_readers/bruker/_tsf.py	76.23% <83.33%> (-0.77%)	⬇️
src/imzy/_readers/bruker/_tdf.py	86.87% <86.95%> (-0.55%)	⬇️

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