Update repo to work with numpy 2.0

[martin-springer]

Describe the bug
The eager update strategy causes an error for numpy 2.0

Full error message and traceback
ERROR rdtools/test - ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!

To Reproduce
Loosen version requirement of numpy in setup.py

Expected behavior
Numpy 2.0 should not cause any issues

[martin-springer]

Done in #428