Add pyrsistent to build dependencies

jupyter / nbclassic

Jupyter Notebook as a Jupyter Server extension

https://nbclassic.readthedocs.io/en/latest

BSD 3-Clause "New" or "Revised" License

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Open matthew-brett opened 11 months ago

matthew-brett commented 11 months ago

When I tried an editable install, I got an error without pyrsistent.