Numpy2

[henrikjacobsenfys]

Updated to use the newest versions of numpy and pint. Dropped Python 3.9, and included 3.13.

I had a lot of trouble with this part of parameter.py, on line 163

    @property
    def value(self) -> numbers.Number:
        """
        Get the value of self as a Number.

        :return: Value of self without unit.
        """
        if self._callback.fget is not None:
            existing_value = self._callback.fget()
            if existing_value != self._scalar.value:
                self._scalar.value = existing_value
        return self._scalar.value

The problem was that the mock did not have a _callback.fget() function. In this case, it returns something else: <MagicMock name='mock.fget()' id='2183984899984'>
The comparison with self._scalar.value used to simply give False, since they are clearly not identical. In Numpy 2, the result is ambiguous and gives an error
I can't quite tell if we need to update value to check if _callback.fget() actually produces a number, since it seems to only be an issue when mocking.
I've updated the tests to mock _callback.fget() as needed, but perhaps it's better to do it more generally?

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[rozyczko]

The changes look benign, and do what needs to be done.
Agreed with the mocking issue - this is pre-existing and we need to find a general solution for proper mocking of those cases.