Test downstream projects

Update pre-commit and github actions #1980

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Run time

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Job	Run time
nbclient	2m 8s
ipywidgets	46s
jupyter_client	6m 23s
ipyparallel	5m 36s
qtconsole	1m 52s
jupyter_kernel_test	37s
spyder_kernels	1m 30s
downstream_check	2s
	18m 54s