add test check on gh action

Author: saurabhdaware

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        node-version: [12.x, 15.x]
+        os: ['windows-latest', 'ubuntu-latest', 'macos-latest']
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm test