fix: revert ipykernel dependency removal

maartenbreddels · maartenbreddels · commit 99a26503b67e · 2023-03-28T15:10:57.000+02:00
diff --git a/python/ipywidgets/setup.cfg b/python/ipywidgets/setup.cfg
@@ -34,6 +34,7 @@ zip_safe = False
 packages = find:
 
 install_requires =
+  ipykernel>=4.5.1
   ipython>=6.1.0
   traitlets>=4.3.1
   widgetsnbextension~=4.0
