chore: use nodejs 16.x

.github/workflows/ci.yml

@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: Use Node.js 18.x
+      - name: Use Node.js 16.x
         uses: actions/setup-node@v1
         with:
-          node-version: 18.x
+          node-version: 16.x
       - name: Run CI
         run: |
           yarn