use Jupyter Lab 4 for building lab extension

Author: mariobuikhuizen

.github/workflows/test.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install "reacton[generate]" ipyvue "jupyterlab<4"  build
+          pip install "reacton[generate]" ipyvue "jupyterlab<5"  build
 
       - name: build wheel
         run: python -m build