Numpy surprises

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New in numpy version 2: numpy int types aren't promoted to bigger types. 

   >>> np.uint8(1) + 255
   <python-input-21>:1: RuntimeWarning: overflow encountered in scalar add
   np.uint8(0)

   >>> np.__version__
   '2.2.4'


The old numpy 1.24 used to promote numpy int types to 64-bit: 

   >>> type(np.uint8(1) + 1)
   <class 'numpy.int64'>
   >>> np.__version__
   '1.24.2'
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