swap to pnpm and update actions

Author: mansona

.github/workflows/ci.yml

@@ -18,13 +18,14 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v6
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
-          cache: npm
-      - run: npm ci
-      - run: npm run lint
+          cache: pnpm
+      - run: pnpm install
+      - run: pnpm run lint
 
   test:
     name: "Test"
@@ -36,11 +37,12 @@ jobs:
         node-version: ['18.x', '20.x', '22.x']
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
+    - uses: pnpm/action-setup@v4
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: ${{ matrix.node-version }}
-        cache: npm
-    - run: npm ci
-    - run: npm test
+        cache: pnpm
+    - run: pnpm install
+    - run: pnpm test