Updated deprecated NumPy alias

[radarhere]

https://github.com/python-pillow/Pillow/actions/runs/3730334148/jobs/6327268745#step:8:4081

/home/runner/work/Pillow/Pillow/Tests/test_numpy.py:196: DeprecationWarning: np.bool8 is a deprecated alias for np.bool_. (Deprecated NumPy 1.24)

See also the NumPy release notes

https://numpy.org/devdocs/release/1.24.0-notes.html#np-str0-and-similar-are-now-deprecated

The scalar type aliases ending in a 0 bit size: np.object0, np.str0, np.bytes0, np.void0, np.int0, np.uint0 as well as np.bool8 are now deprecated and will eventually be removed.

[hugovk]

Do you know which version of NumPy added the replacement np.bool_ and when it says released?

That's now the minimum version required to run this code. It only affects a test, so should be fine.

[radarhere]

I can see it in the docs for NumPy 1.13 - https://numpy.org/doc/1.13/reference/arrays.scalars.html. That's as far back as the docs go.

I can see it used in a pull request from 2014 - https://github.com/numpy/numpy/pull/4105/files

[hugovk]

That's plenty then, thank you!