Deprecation Warning for Jupyter

[florencekl]

Im currently running some oct2py scripts in my testing setup using pytest, which is when i noticed that pytest generally throws me a warning for my tests whenever im using oct2py.

/home/USER/.local/lib/python3.8/site-packages/metakernel/_metakernel.py:20: DeprecationWarning: Jupyter is migrating its paths to use standard platformdirs
given by the platformdirs library.  To remove this warning and
see the appropriate new directories, set the environment variable
`JUPYTER_PLATFORM_DIRS=1` and then run `jupyter --paths`.
The use of platformdirs will be the default in `jupyter_core` v6
  from jupyter_core.paths import jupyter_config_path, jupyter_config_dir

This is apparently caused by the dependency on jupyter-core.

The warning/error can be reproduced by creating a simple script:

import oct2py

oc = oct2py.Oct2Py()
x = oc.zeros(3, 3)
print(x, x.dtype)

and running it with enabled warnings: python3 -W default oct2py_warning.py

This is on the current version oct2py 5.7.1