Unpin numpy

[hauntsaninja]

See also https://iscinumpy.dev/post/bound-version-constraints/

The workaround here is unnecessary (discussed in https://github.com/google/magika/issues/43). Since numpy declares python_requires, pip's resolver will automatically discard newer numpy solutions when installing on Python 3.8.

This also saves you a chore every year when Python makes a new release :-)