This was somehow causing errors where instead of looking for `List` in
`typing`, it was looking for `List` in `numpy.typing`---pylab must
import it somewhere.

For reference, here's the complete traceback:

```
Traceback (most recent call last):
  File "/opt/hostedtoolcache/Python/3.11.12/x64/bin/pynml-modchananalysis", line 5, in <module>
    from pyneuroml.neuron.analysis.HHanalyse import main
  File "/opt/hostedtoolcache/Python/3.11.12/x64/lib/python3.11/site-packages/pyneuroml/neuron/analysis/HHanalyse.py", line 141, in <module>
    def get_states(txt: str) -> typing.List[str]:
                                ^^^^^^^^^^^
  File "/opt/hostedtoolcache/Python/3.11.12/x64/lib/python3.11/site-packages/numpy/typing/__init__.py", line 189, in __getattr__
    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
AttributeError: module 'numpy.typing' has no attribute 'List'
```