update jupyterlab-server-proxy reference

fhoehle · fhoehle · commit 0733ae2cfed8 · 2020-02-28T19:43:26.000+01:00
diff --git a/postBuild b/postBuild
@@ -2,7 +2,7 @@
 
 # Enable the proxy extension in notebook and lab
 jupyter serverextension enable --py jupyter_server_proxy
-jupyter labextension install jupyterlab-server-proxy
+jupyter labextension install @jupyterlab/server-proxy
 jupyter lab build
 
 code-server --install-extension ms-python.python
