Some Magics do not function with Numpy 2.0

After upgrading Numpy to version 2.0, some Magics commands do not work correctly due to the way Numpy handles NaN. 

For example:

```
sysuse auto, clear
%head 10
```
leads to 

**browse failed.
`np.NaN` was removed in the NumPy 2.0 release. Use `np.nan` instead.**

The current workaround is to downgrade Numpy to version 1.26.4 or earlier. 