Test downstream projects

Remove deprecated `shell_streams` and `_parent_header` shims #2392

Sign in to view logs

Run time

Learn about OS pricing on GitHub Actions

Job	Run time
ipyparallel	20m 15s
nbclient	1m 59s
jupyter_kernel_test	41s
jupyter_client	5m 30s
ipywidgets	59s
ipyparallel	20m 15s
ipywidgets	59s
nbclient	1m 59s
jupyter_client	5m 30s
jupyter_kernel_test	41s
	58m 48s