setting: github actions 스크립트 수정

.github/workflows/test-on-push.yml

@@ -6,14 +6,18 @@ jobs:
   test:
     name: Run test
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [18.x]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+      - name: Use Node.js ${{ matrix.node }}
+        uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node: ${{ matrix.node}}
+          cache: 'npm'
 
       - name: Install dependencies
         run: npm install --immutable