[konstntokas]

Remove the xarray version restriction, as it was originally introduced to maintain compatibility with Zarr 2 (zarr>=2,<3). This restriction is no longer necessary after upgrading to Zarr 3 (zarr>=3,<4) in #112.

Checklist (strike out non-applicable):

• Changes documented in CHANGES.md
• Related issue exists and is referred to in the PR description and CHANGES.md
• Added docstrings and API docs for any new/modified user-facing classes and functions
• Changes/features documented in docs/*
• Unit-tests adapted/added for changes/features
• Test coverage remains or increases (target 100%)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e723d5f) to head (f06c703).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #116   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines         1559      1559           
=========================================
  Hits          1559      1559           

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