chore: Update Node.js version to 18 in test workflow

.github/workflows/test-workflow.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Node.js
       uses: actions/setup-node@v2
       with:
-        node-version: '14'
+        node-version: '18'
 
     - name: Install dependencies
       run: npm install --also=dev