update node version

Author: osiux

.github/workflows/gh-pages.yml

@@ -16,13 +16,13 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 16
       - name: Install dependencies
         run: npm ci
       - name: Build
         run: npm run build
       - name: Build Docs
-        run: cd ./usage && npm install && npm run build
+        run: cd ./usage && npm ci && npm run build
       - name: Publish docs
         uses: peaceiris/actions-gh-pages@v3
         if: ${{ github.ref == 'refs/heads/master' }}