Update actions/setup-node action to v2.4.1

Author: renovate-bot

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Setup Node.js environment
-        uses: actions/setup-node@v2.1.4
+        uses: actions/setup-node@v2.4.1
         with:
           node-version: 12.x
       - name: Restore caches