Add notebook direct dependency

Author: krassowski

.github/workflows/job.test.yml

@@ -454,6 +454,9 @@ jobs:
       - name: Install JupyterLab
         shell: bash -l {0}
         run: python -m pip install 'jupyterlab${{ matrix.lab }}'
+      - name: Install Notebook (to test serverextension)
+        shell: bash -l {0}
+        run: python -m pip install 'notebook'
       - name: Install the server package
         run: cd dist && python -m pip install -vv jupyter_lsp*.whl
       - name: install the source extension

requirements/github-actions.yml

@@ -6,6 +6,8 @@ channels:
 
 dependencies:
   - jupyterlab {lab}
+  # to test serverextension
+  - notebook
   # build dependencies
   - pip
   - nodejs {nodejs}