Only publish distribution to Test PyPI

[zhiqwang]

Only publish distribution 📦 to Test PyPI

[codecov]

Codecov Report

Merging #306 (87a5527) into main (be343c5) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #306   +/-   ##
=======================================
  Coverage   94.93%   94.93%           
=======================================
  Files          11       11           
  Lines         731      731           
=======================================
  Hits          694      694           
  Misses         37       37           

Flag	Coverage Δ
unittests	94.93% <ø> (ø)

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