Incompatibility with NumPy >=v2.0 and SciPy >=v1.14

[ben-l-p]

NumPy 2.0 has been released, which depreciates many functions that have been used in SHARPy. This now causes many unit tests to fail, and there is also a corresponding SciPy version which presents issues. These all show up as warnings in previous versions. A temporary fix #292 sets an upper ceiling on the versions which can be used (was previously set to use latest).

We aim to update the code so that we don't need this limit, as it will cause incompatibilities with new packages which use features from v2.0.