pin against bad jupyter-client

Summary: this might get pulled before I land this jupyter/jupyter_client#634

Test Plan: bk

Reviewers: max, owen, prha

Reviewed By: prha

Differential Revision: https://dagster.phacility.com/D7340

python_modules/libraries/dagstermill/setup.py

@@ -34,6 +34,8 @@ def get_version() -> str:
             # https://github.com/nteract/papermill/issues/519,
             # https://github.com/ipython/ipykernel/issues/568
             "ipykernel>=4.9.0,!=5.4.0,!=5.4.1",
+            # jupyter-client 6.1.13 breaks, can remove once dropped from pypi
+            "jupyter-client!=6.1.13",
             "nbconvert>=5.4.0,<6.0.0",
             "scrapbook >=0.5.0",
             "papermill>=1.0.0,<2.0.0",