Fixups for Numpy 2 compatibility

[pkgw]

Overview

Try to make sure we work with Numpy 2!

Checklist

• Changed code has some test coverage (or justify why not)
• [N/A] Changes in functionality documented (or justify why not)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.40%. Comparing base (8fcaff9) to head (d8800e9).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #377      +/-   ##
==========================================
- Coverage   56.51%   56.40%   -0.11%     
==========================================
  Files          25       25              
  Lines        2872     2863       -9     
==========================================
- Hits         1623     1615       -8     
+ Misses       1249     1248       -1     

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[pkgw]

This one change appears to be all that we need!