Update CI configuration.

[kitsuyui]

• Take the result of trial and error in kitsuyui/pypi-playground.
• Migrate to poetry.

[codecov-commenter]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (374e4d1) compared to base (4828120).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #17   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          204       204           
=========================================
  Hits           204       204           

Flag	Coverage Δ
unittests	100.00% <0.00%> (ø)

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