Bump hatchling

[fcollonval]

References

Fixes #15692

Code changes

Bump hatchling to include the fix for importlib.util import error

User-facing changes

None

Backwards-incompatible changes

None

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[krassowski]

So this is going from 1.5.0 to 1.21.1, two relevant changes in the changelog:

• 1.18.0 dropped support for Python 3.7
• 1.19.0 added official support for Python 3.12 (though my reading is that it already worked before)

I think this is fine for the main and 4.0.x; not sure about backporting to 3.6.x though.

[fcollonval]

not sure about backporting to 3.6.x though.

It is fine as we are using jupyter-packaging for 3.6:

jupyterlab/pyproject.toml

Line 2 in ccc9082

requires=["jupyter_packaging>=0.9,<2"]

[krassowski]

Thank you!