Update circleci config to include both widget and jupyterlab extension build

Author: marthacryan

.circleci/config.yml

@@ -340,8 +340,9 @@ jobs:
             . venv/bin/activate
             pip install --upgrade pip wheel
             pip install -r ./test_requirements/requirements_38_core.txt black inflect
+            pip install jupyterlab~=3.0
       - run:
-          name: Update widget plotly.js version
+          name: Update jupyterlab-plotly and jupyter widget plotly.js version
           command: |
             cd packages/python/plotly
             . venv/bin/activate
@@ -395,16 +396,29 @@ jobs:
             conda config --remove channels defaults
             conda config --add channels conda-forge
             conda create -n env --yes python=3.9 conda-build=3.28.4 conda-verify
-            conda install -n env -c conda-forge nodejs=16
+            conda install -n env -c conda-forge jupyterlab=3 nodejs=16
             conda init bash
             mkdir output
 
+     - run:
+          name: initial NPM Build
+          command: |
+            eval "$(conda shell.bash hook)"
+            conda activate env
+            cd packages/javascript/jupyterlab-plotly
+            npm ci
+            npm run build:prod
+            git status
+
       - run:
           name: PyPI Build
           command: |
             eval "$(conda shell.bash hook)"
             conda activate env
-            cd packages/python/plotly
+            cd packages/javascript/jupyterlab-plotly
+            npm pack
+            mv jupyterlab-plotly*.tgz ../../../output
+            cd ../../python/plotly
             python setup.py sdist bdist_wheel
             cp -R dist ../../../output/dist
             git status