Fix: Memory leak of PyO3

[koseki2580]

There was a memory leak bug in version 0.18.2 of PyO3.Related issue

This bug has been fixed in version 0.19.1. Related release

[codecov]

Codecov Report

Merging #240 (a2683a4) into main (d6867d7) will not change coverage.
Report is 2 commits behind head on main.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #240   +/-   ##
=======================================
  Coverage   99.49%   99.49%           
=======================================
  Files           6        6           
  Lines         393      393           
  Branches       80       80           
=======================================
  Hits          391      391           
  Misses          1        1           
  Partials        1        1           

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[samuelcolvin]

thanks so much.