Update README installation instructions with JupyterLab 0.35 and Chart Editor 1.0

Author: jonmmease

README.md

@@ -81,13 +81,13 @@ For use in JupyterLab, install the `jupyterlab` and `ipywidgets`
 packages using pip... 
 
 ```
-pip install jupyterlab==0.34 "ipywidgets>=7.2"
+pip install jupyterlab==0.35 "ipywidgets>=7.2"
 ```
 
 or conda.
 
 ```
-conda install jupyterlab=0.34 "ipywidgets>=7.2"
+conda install jupyterlab=0.35 "ipywidgets>=7.2"
 ```
 
 Then run the following commands to install the required JupyterLab extensions:
@@ -99,13 +99,16 @@ export NODE_OPTIONS=--max-old-space-size=4096
 set NODE_OPTIONS=--max-old-space-size=4096
 
 # Jupyter widgets extension
-jupyter labextension install @jupyter-widgets/jupyterlab-manager@0.37 --no-build
+jupyter labextension install @jupyter-widgets/jupyterlab-manager@0.38 --no-build
 
 # FigureWidget support
 jupyter labextension install plotlywidget@0.4.0 --no-build
 
 # offline iplot support
-jupyter labextension install @jupyterlab/plotly-extension@0.17.2 --no-build
+jupyter labextension install @jupyterlab/plotly-extension@0.18 --no-build
+
+# JupyterLab chart editor support (optional)
+jupyter labextension install jupyterlab-chart-editor@1.0 --no-build
 
 # Build extensions (must be done to activate extensions since --no-build is used above)
 jupyter lab build