Revert "chore: use node 20 in ci"

This reverts commit 7263272.

.github/workflows/publish_npm.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v3
         with:
-          node-version: '20.x'
+          node-version: '18.x'
           registry-url: 'https://registry.npmjs.org'
       - name: Setup
         run: npm install