Update pyproject.toml

[henrydingliu]

pandas 3.0 is wrecking things. updating dependency as a temp fix.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.10%. Comparing base (dafa79b) to head (1d49a9d).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #663   +/-   ##
=======================================
  Coverage   85.10%   85.10%           
=======================================
  Files          85       85           
  Lines        4869     4869           
  Branches      619      619           
=======================================
  Hits         4144     4144           
  Misses        517      517           
  Partials      208      208           

Flag	Coverage Δ
unittests	85.10% <ø> (ø)

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