Adding typing, changing the data model, probably a v3.0 rewrite

[ericdill]

For now I'm exploring what it would look like to add typing and pydantic data models to depfinder. It's turning into somwhat of a rewrite of the whole library. We'll see how it goes. If anything, this would be a major version bump to 3.0 if / when we decide to merge this

[codecov-commenter]

Codecov Report

Patch coverage: 93.27% and project coverage change: +0.80 🎉

Comparison is base (e981839) 91.73% compared to head (e6c083e) 92.54%.

❗ Current head e6c083e differs from pull request most recent head 9affd6c. Consider uploading reports for the commit 9affd6c to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
+ Coverage   91.73%   92.54%   +0.80%     
==========================================
  Files           7        7              
  Lines         472      523      +51     
==========================================
+ Hits          433      484      +51     
  Misses         39       39              

Impacted Files	Coverage Δ
depfinder/stdliblist.py	78.57% <66.66%> (ø)
depfinder/cli.py	94.89% <91.66%> (-0.25%)	⬇️
depfinder/inspection.py	90.13% <92.85%> (+1.40%)	⬆️
depfinder/utils.py	88.13% <92.85%> (+5.63%)	⬆️
depfinder/reports.py	96.93% <95.00%> (+0.38%)	⬆️
depfinder/main.py	95.74% <97.61%> (+0.34%)	⬆️

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