chore: add tests to the CI

.github/workflows/ci.yml

@@ -53,3 +53,24 @@ jobs:
         with:
           name: dist
           path: dist/
+
+  tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set Node.js 16.x
+        uses: actions/[email protected]
+        with:
+          node-version: 16.x
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 7
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile --prefer-offline
+
+      - name: Run tests
+        run: pnpm test