Bound traitlets<5.10
and add test for issue observed in newer versions
#54
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I've obseved that Dict, List, Instance, and Command trait types no longer gets their help strings set with traitlets 5.10.0 but this wasn't an issue in traitlets 5.9.0. I've now tracked this down to work all the way up to ipython/traitlets#818 was merged.
Introducing this causes tests to fail, but they should fail because we have an issue right now. This has been observed in:
latest
docs is missing some traitlets help kubespawner#788