docs(changelog): add 0.20.0 release notes

[mkniewallner]

Release notes for 0.20.0.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.1%. Comparing base (673086e) to head (1941b4d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #834   +/-   ##
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  Coverage   92.1%   92.1%           
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  Files         37      37           
  Lines        992     992           
  Branches     175     175           
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  Hits         914     914           
  Misses        62      62           
  Partials      16      16           

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[mkniewallner]

Hold on, just spotted here that the newly added job that builds PyPy wheels for ARM64 actually builds AMD64. Will check that before releasing.

[mkniewallner]

Well it looks like PyPy does not support Windows ARM in fact: https://pypy.org/download.html. My bad, since the CI job was green, I assumed it worked, but I should have checked the generated wheels better. Will update the changelog.

[mkniewallner]

Updated the workflow to only build ARM64 wheels for Windows CPython, and tested the workflow here: https://github.com/fpgmaas/deptry/actions/runs/10564717790, so this is ready to merge.