Bump tests to node 20.x or higher

Author: bluesmoon

.github/workflows/test.yml

@@ -8,11 +8,12 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Get Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
-          node-version: '12.x'
+          node-version: '>=20.x'
+          check-latest: true
       - run: npm install
       - run: npm run updatedb license_key=${{ secrets.MAXMIND_LICENSE_KEY }}
       - run: npm test