update ci to run tests on all platforms

.github/workflows/ci.yml

@@ -36,10 +36,29 @@ jobs:
       - name: Build
         run: npm run build
 
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        runs-on: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.runs-on }}
+    needs: build
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup nodejs 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+
+      - name: Install dependencies
+        run: npm ci
+
       - name: Test
         run: npm run test
 
-  test:
+  test-run:
     strategy:
       fail-fast: false
       matrix: