add jupyterlab-manager to top level README

ianhi · ianhi · commit 381ee80d3ea9 · 2020-06-02T17:16:33.000-04:00
diff --git a/README.md b/README.md
@@ -54,6 +54,7 @@ When developing your extensions, you need to manually enable your extensions wit
 notebook / lab frontend. For lab, this is done by the command:
 
 ```
+jupyter labextension install @jupyter-widgets/jupyterlab-manager --no-build
 jupyter labextension install .
 ```
 
