Restructure package build

[tobiaslatour]

Move build config from setup.py to pyproject.toml for a more up-to-date build

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[tobiaslatour]

• The JuBiotech maintainers know my real name.

At least one of the following two applies:

• The JuBiotech maintainers know my current employer.

• I am not making this contribution on behalf of my current employer.

[tobiaslatour]

I have read the CLA Document and I hereby sign the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.65%. Comparing base (79a4410) to head (294e625).
Report is 55 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #94      +/-   ##
==========================================
+ Coverage   95.37%   95.65%   +0.28%     
==========================================
  Files          18       19       +1     
  Lines        1102     1174      +72     
==========================================
+ Hits         1051     1123      +72     
  Misses         51       51              

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