Update dependencies (#996)

.github/workflows/test.yml

@@ -0,0 +1,36 @@
+name: Test build
+
+on:
+  pull_request:
+    types: [ opened, reopened ]
+
+env:
+  NODE: 14
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: "${{ env.NODE }}"
+          cache: npm
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.6
+          bundler-cache: true
+
+      - run: ruby --version
+      - run: node --version
+
+      - name: Install npm dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build