Skimage no upper bound

[afermg]

We ideally want to be able to support py313 in cp_measure, for that we ought to remove the upper bound on scikit-image that I placed a while ago. The reasoning behind it was that above scikit image 0.24 do not support python 3.9. I tested that it seems fine to relax the constraints. All but one test run, but I will try to fix it.

======================== short test summary info ============================================
FAILED tests/test_cpmorphology.py::TestWhiteTophat::test_01_04_random - ValueError: The binary mode of fromstring is removed, use frombuffer instead
======================================================================================================== 
1 failed, 506 passed, 2 skipped, 50 warnings in 50.46s 

[afermg]

After a minor update to the tests we have no errors:

$pytest
...
507 passed, 2 skipped, 50 warnings in 43.39s 

[gnodar01]

Thanks! Closing, but commits cherry-picked to PR #134