chore: update ci

Author: antfu

.github/workflows/test.yml

@@ -17,15 +17,15 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, lts/*]
+        node-version: [20.x, lts/*]
         os: [ubuntu-latest, windows-latest, macos-latest]
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}