feat: update runtime to node 20 (#246)

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 20.x
           cache: npm
       - run: npm ci
       - run: npm run build

.github/workflows/update-major-version.yml

@@ -11,7 +11,7 @@ on:
         type: choice
         description: The major version tag to update
         options:
-          - v3
+          - v4
 
 jobs:
   tag: