chore: update supported Node.js versions to 20.x and later (#493)

BREAKING CHANGE: update supported Node.js versions to 20.x and later

Author: Trott

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 19.x, 20.x, 21.x, 22.x, 23.x]
+        node-version: [20.x, 21.x, 22.x, 23.x, 24.x]
 
     steps:
     - uses: actions/checkout@v4