deps: enforce upper limit jupyter_client
and pyzmq
#546
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Why this PR?
To work around a bug in
notebook
we need to pin the upper limit ofjupyter_client
andzeromq
(see jupyter/notebook#6748).Until now, we've been asking users to add these extra constraints manually, but forgetting it can lead to broken interactive notebook functionality. It's unnecessary friction when it comes to installing
pylake
. Instead of adding these lines to the pip installation instructions, it's better to just add it to the requirements for the time being.When we release on
conda
, we should also pin the upper limit in the recipe there.