ci: use Node.js 16

Author: fengyuanchen

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - run: npm install
       - run: npm run lint
       - run: npm run build

.github/workflows/deploy.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - run: npm install
       - run: npm run build:docs
       - run: |