build(deps): use v4 of setup-node action, use node 20

Author: mikehardy

.github/workflows/workflow.yml

@@ -9,9 +9,9 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set Node.JS
-      uses: actions/setup-node@master
+      uses: actions/setup-node@v4
       with:
-        node-version: 16.x
+        node-version: 20
 
     - name: npm install
       run: npm install