test: Also run CI on Windows.

.github/workflows/ci.yml

@@ -63,6 +63,33 @@ jobs:
       - name: Run deployment tests
         run: npm run test:deploy
 
+  test-windows:
+    runs-on: windows-latest
+    strategy:
+      matrix:
+        node-version:
+          - 12.x
+          - 14.x
+    steps:
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Ensure line endings are consistent
+        run: git config --global core.autocrlf input
+      - name: Check out repository
+        uses: actions/checkout@v2
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+      - name: Run build scripts
+        run: npm run build
+      - name: Run unit tests
+        run: npm run test:unit
+      - name: Run integration tests
+        run: npm run test:integration
+      - name: Run deployment tests
+        run: npm run test:deploy
+
   coveralls:
     needs: test
     runs-on: ubuntu-latest