Migrate versioning tool to tbump, and most of setup.cfg into pyprojec…

[fizyk]

…t.toml

[codecov]

Codecov Report

Base: 90.07% // Head: 97.05% // Increases project coverage by +6.98% 🎉

Coverage data is based on head (ec2f107) compared to base (29c985c).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #109      +/-   ##
==========================================
+ Coverage   90.07%   97.05%   +6.98%     
==========================================
  Files           8        8              
  Lines         272      272              
==========================================
+ Hits          245      264      +19     
+ Misses         27        8      -19     

Flag	Coverage Δ
unittests	97.05% <ø> (+6.98%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
port_for/ephemeral.py	91.17% <0.00%> (+55.88%)	⬆️

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