Issues with zarr python package >3

[JensWendt]

You should probably set the install requirements to zarr<3 as versions 3+ seem to cause problems
my pip install omero-cli-zarr installed zarr-3.0.0a0 which lead to weird stuff like

omero zarr --help
Error loading: C:\ProgramData\anaconda3\envs\ngff-challenge\lib\site-packages\omero\plugins\zarr.py
Traceback (most recent call last):
  File "C:\ProgramData\anaconda3\envs\ngff-challenge\lib\site-packages\omero\cli.py", line 1677, in loadpath
    exec(f.read(), loc)
  File "<string>", line 1, in <module>
  File "C:\ProgramData\anaconda3\envs\ngff-challenge\lib\site-packages\omero_zarr\__init__.py", line 19, in <module>
    from ome_zarr.format import CurrentFormat
  File "C:\ProgramData\anaconda3\envs\ngff-challenge\lib\site-packages\ome_zarr\format.py", line 7, in <module>
    from zarr.storage import FSStore
ModuleNotFoundError: No module named 'zarr.storage'

After downgrading to zarr==2.18.3, it works again.