fix(ci): use node 20 in test environment

Author: edorgeville

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v3
         with: 
-          node-version: 16
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci