Pin Jedi to <0.17.2.

Carreau · Carreau · commit 8fcdcd384b8b · 2021-11-26T11:21:21.000-08:00
This may not completely fix the issue, in particular pip may decide to
downgrade IPython,  but maybe this will lead to less errors.
diff --git a/setup.py b/setup.py
@@ -186,7 +186,7 @@
 
 install_requires = [
     'setuptools>=18.5',
-    'jedi>=0.10',
+    'jedi>=0.10,<=0.17.2',
     'decorator',
     'pickleshare',
     'traitlets>=4.2',
