Numpy compatibility issue

[skojaku]

Issue

Nemtropy has a compatibility issue with numpy 2.0+ where np.infty has been removed from the API. See the following error messge:

    778     raise AttributeError(__former_attrs__[attr], name=None)
    780 if attr in __expired_attributes__:
--> 781     raise AttributeError(
    782         f"`np.{attr}` was removed in the NumPy 2.0 release. "
    783         f"{__expired_attributes__[attr]}",
    784         name=None
    785     )
    787 if attr == "chararray":
    788     warnings.warn(
    789         "`np.chararray` is deprecated and will be removed from "
    790         "the main namespace in the future. Use an array with a string "
    791         "or bytes dtype instead.", DeprecationWarning, stacklevel=2)

AttributeError: `np.infty` was removed in the NumPy 2.0 release. Use `np.inf` instead.

The code has been updated to use np.inf instead, which is the recommended replacement and maintains backward compatibility with earlier NumPy versions.

All instances of np.infty in the codebase have been replaced with np.inf.