Update getting-started.md

Author: nicolaskruchten

python/getting-started.md

@@ -47,12 +47,12 @@ Thanks to deep integration with the [orca](https://github.com/plotly/orca) image
 plotly.py may be installed using pip...
 
 ```
-$ pip install plotly==4.1.0
+$ pip install plotly==4.2.1
 ```
 or conda.
 
 ```
-$ conda install -c plotly plotly=4.1.0
+$ conda install -c plotly plotly=4.2.1
 ```
 This package contains everything you need to write figures to standalone HTML files.
 
@@ -132,10 +132,10 @@ set NODE_OPTIONS=--max-old-space-size=4096
 jupyter labextension install @jupyter-widgets/jupyterlab-manager@1.0 --no-build
 
 # jupyterlab renderer support
-jupyter labextension install jupyterlab-plotly@1.1.0 --no-build
+jupyter labextension install jupyterlab-plotly@1.2.0 --no-build
 
 # FigureWidget support
-jupyter labextension install plotlywidget@1.1.0 --no-build
+jupyter labextension install plotlywidget@1.2.0 --no-build
 
 # JupyterLab chart editor support (optional)
 jupyter labextension install jupyterlab-chart-editor@1.2 --no-build