Bump Numpy required version to 1.17

[DimitriPapadopoulos]

We use the named parameter shape of numpy.empty_like:

• https://github.com/zarr-developers/zarr-python/blob/4362bb4/zarr/hierarchy.py#L145
• https://github.com/zarr-developers/zarr-python/blob/4362bb4/zarr/core.py#L2134-L2135
• ...

It had been introduced in Numpy 1.17.0: https://numpy.org/doc/stable/reference/generated/numpy.empty_like.html

TODO:

• [ ] Add unit tests and/or doctests in docstrings
• [ ] Add docstrings and API docs for any new/modified user-facing classes and functions
• [ ] New/modified features documented in docs/tutorial.rst
• [ ] Changes documented in docs/release.rst
• [X] GitHub Actions have all passed
• [X] Test coverage is 100% (Codecov passes)

[DimitriPapadopoulos]

Perhaps test against the oldest supported version instead of / in addition to the latest version: https://github.com/zarr-developers/zarr-python/blob/4362bb438f537b37ebd271506b774dfa31f5e68e/requirements_dev_numpy.txt#L1-L4

[jakirkham]

Thanks Dimitri! 🙏

Merging once CI passes 😄

[codecov[bot]]

Codecov Report

Merging #1192 (b99505d) into main (da7ba0c) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1192   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files          35       35           
  Lines       14135    14136    +1     
=======================================
+ Hits        14134    14135    +1     
  Misses          1        1           

Impacted Files	Coverage Δ
zarr/util.py	100.00% <0.00%> (ø)