Update circleci config to include both widget and jupyterlab extension build

Author: marthacryan

.circleci/config.yml

@@ -438,7 +438,10 @@ jobs:
           command: |
             eval "$(conda shell.bash hook)"
             conda activate env
-            cd packages/python/plotly/js
+            cd packages/javascript/jupyterlab-plotly
+            npm pack
+            mv jupyterlab-plotly*.tgz ../../../output
+            cd ../../python/plotly/js
             npm run build
             mv ../bundle.js ../../../../output