Bump version to 3.2.0.

[dajiaji]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.34%. Comparing base (8f816a4) to head (9ce95c6).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #647   +/-   ##
=======================================
  Coverage   97.34%   97.34%           
=======================================
  Files          32       32           
  Lines        3357     3357           
=======================================
  Hits         3268     3268           
  Misses         89       89           

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