ExactPack incompatible with numpy >= 2

ExactPack's requirements.txt gives the numpy requirement as numpy >= 1.13.3, but I get the following error when trying to run its tests:

$ pytest $(python3 -c 'import importlib.resources; print(import lib.resources.files("exactpack")')
...
______________ ERROR collecting venv/lib/python3.11/site-packages/exactpack/tests/test_riemann.py _______________
ImportError while importing test module '.../venv/lib/python3.11/site-packages/exactpack/tests/test_riemann.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/opt/python/3.11/lib/python3.11/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
../venv/lib/python3.11/site-packages/exactpack/tests/test_riemann.py:11: in <module>
    from exactpack.solvers.riemann.ep_riemann import IGEOS_Solver, GenEOS_Solver, streakplot
../venv/lib/python3.11/site-packages/exactpack/solvers/riemann/__init__.py:256: in <module>
    from .ep_riemann import *
../venv/lib/python3.11/site-packages/exactpack/solvers/riemann/ep_riemann.py:8: in <module>
    import matplotlib.pyplot as plt
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/__init__.py:161: in <module>
    from . import _api, _version, cbook, _docstring, rcsetup
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/rcsetup.py:27: in <module>
    from matplotlib.colors import Colormap, is_color_like
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/colors.py:57: in <module>
    from matplotlib import _api, _cm, cbook, scale
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/scale.py:22: in <module>
    from matplotlib.ticker import (
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/ticker.py:143: in <module>
    from matplotlib import transforms as mtransforms
/opt/python/3.11/lib/python3.11/site-packages/matplotlib/transforms.py:49: in <module>
    from matplotlib._path import (
E   ImportError: numpy.core.multiarray failed to import
------------------------------------------------ Captured stderr ------------------------------------------------

A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.3.3 as it may crash. To support both 1.x and 2.x
versions of NumPy, modules must be compiled with NumPy 2.0.
Some module may need to rebuild instead e.g. with 'pybind11>=2.12'.

If you are a user of the module, the easiest solution will be to
downgrade to 'numpy<2' or try to upgrade the affected module.
We expect that some modules will need time to support NumPy 2.

When I forced installation of numpy < 2, the tests ran as expected.

Start with requirements.txt and the failing test path exactpack/tests/test_riemann.py. Reproduce the import failure with the declared NumPy range, then verify the dependency constraint and run the ExactPack tests; done means the tests pass with a supported NumPy installation.