Update main.yml

.github/workflows/main.yml

@@ -6,28 +6,17 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [12.x]
-
+        os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v1
-
-      - name: Cache node modules
-        uses: actions/cache@v1
+      - uses: actions/checkout@v2
+      - name: Setup node 12
+        uses: actions/setup-node@v2
         with:
-          path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: |
-            ${{ runner.os }}-node-
-
-      - name: Node ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
-        with:
-          node-version: ${{ matrix.node-version }}
-
-      - name: unit tests
-        run: |
-          npm install
-          npm test
+          node-version: 12.x
+      - run: npm ci
+      - run: npm run build
+      - run: npm run format-check
+      - run: npm test