Added Haskell as a supported language.

[codeweber]

Haskell has been added as a supported language. Example notebook has been added.

Tests executed:

• pytest was run and mirror tests pass.
• Package was built locally and installed. It is possible to pair a Jupyter notebook running a Haskell kernel with a script; basic functionality has been tested (e.g. opening and editing script, checking to see if changes are reflected in notebook and vice versa).

[mwouts]

Excellent! Thank you @codeweber for your contribution. I'll have a look very soon and if everything goes well I'll try to package a new release next week at most.

[mwouts]

To fix the pre-commit check on the CI, you will have to run

pip install pre-commit
pre-commit run --all

(see also https://jupytext.readthedocs.io/en/latest/developing.html)

This will cause a very minor change which should fix the CI:

Or even maybe you could just add the missing coma manually?

Thank you,

[codeweber]

@mwouts thank you! I've committed a change with the required comma so that the pre-commit checks pass successfully.