Documentation: Mention Node version used in successful dev setup

andrewhead · web-flow · commit 4a8b341bd8c7 · 2018-12-18T16:12:53.000-08:00
diff --git a/README.md b/README.md
@@ -20,6 +20,8 @@ jlpm run watch                # automatically recompile sources
 jupyter lab --watch           # launch Jupyter Lab, automatically re-load extension
 ```
 
+These setup instructions have been successfully completed with Node v9.5.0.
+
 ### Pre-alpha Jupyter notebook version
 
 This project was initially developed as a Jupyter notebook extension. It is not being maintained, as it requires access to the internal API, including parts that change across minor versions. Still, if you want to build and install the notebook version, run these commands:
