Need newer version of jupyter_client

requirements.txt

@@ -17,8 +17,7 @@ ipykernel == 5.1.4
 ipython == 7.12.0
 ipython_genutils == 0.2.0
 Jinja2 == 2.11.2
-jupyter == 1.0.0
-jupyter_client == 5.3.4
+jupyter_client == 6.1.7
 jupyter_console == 6.1.0
 jupyter-core == 4.6.1
 karabo_data == 0.7.0