NumPy 2.0 compatibility

[jacobpennington]

Describe the issue:

NumPy version >= 2.0.0 breaks compatibility with some of our third-party dependencies. Our next update to pip will change our setup requirements to NumPy >=1.20.0, <2.0.0, at least until those other packages update to support the new version. In the meantime (or if installing an older version of KS4), if you create a new Kilosort4 installation, you might end up with an incompatible version of NumPy.

To fix this, run the following after installing Kilosort4: pip install --upgrade numpy<2.0.0