chore: upgrade ci versions

Author: omichelsen

.github/workflows/ci.yml

@@ -8,11 +8,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Use Node.js 16.x
-      uses: actions/setup-node@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-node@v4
       with:
-        node-version: 16.x
+        node-version: 20
     - run: npm ci
     - run: npm test