add CI task

.github/workflows/github-actions-demo.yml

@@ -45,3 +45,16 @@ jobs:
         uses: browser-actions/setup-chrome@latest
       - run: npm ci
       - run: npm run test:browser
+
+  react-native-tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install Node.js 14
+        uses: actions/setup-node@v2
+        with:
+          node-version: 14.x
+          cache: 'npm'
+      - run: npm ci
+      - run: npm run test:react-native