Maintenance 2024a

[amotl]

• README: Update badges, GitHub changed their reStructuredText rendering
• Add support for Python 3.11 and 3.12
• CI: Update to codecov-action@v4, including token use
• CI: Add Dependabot confguration
• Remove flake8/pyflake
• Format code
• CI: Use Python 3.8, because Black 24 is not available for Python 3.7
• Update auxiliary dependencies
• Update .gitignore configuration
• Replace appdirs with platformdirs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.86%. Comparing base (e5cb3fd) to head (58af948).

❗ Current head 58af948 differs from pull request most recent head 60533b6. Consider uploading reports for the commit 60533b6 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #11   +/-   ##
=======================================
  Coverage   44.86%   44.86%           
=======================================
  Files          14       14           
  Lines         954      954           
=======================================
  Hits          428      428           
  Misses        526      526           

Flag	Coverage Δ
unittests	44.86% <ø> (ø)

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