Add github action

Author: fcollonval

.github/workflows/main.yml

@@ -14,4 +14,20 @@ jobs:
       - name: Install node
         uses: actions/setup-node@v1
         with:
-          node-version: "10.x"
+          node-version: "12.x"
+      - name: Install Python
+        uses: actions/setup-python@v1
+        with:
+          python-version: "3.7"
+          architecture: "x64"
+      - name: Install dependencies
+        run: python -m pip install jupyterlab
+      - name: Build the extension
+        run: |
+          jlpm
+          cd test-jlab-toastify
+          jlpm remove jupyterlab_toastify
+          jlpm add file:${PWD}/..
+          jlpm build
+          jupyter labextension install .
+          python -m jupyterlab.browser_check