Upgrade each GitHub Actions dependencies.

.github/workflows/pullrequest.yaml

@@ -11,26 +11,28 @@ jobs:
         node-version: [20.x]
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
+      - name: use Yarn v4
+        run: corepack enable; yarn set version 4.1.0
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path
         run: echo "::set-output name=dir::$(yarn cache dir)"
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         id: yarn-cache
         with:
           path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock.json') }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
           restore-keys: |
             ${{ runner.os }}-yarn-
       - name: Install dependencies
-        run: yarn install --prefer-offline
+        run: yarn install
       - name: Build and Test
         env:
           REACT_APP_FIREBASE_API_KEY: ${{ secrets.REACT_APP_FIREBASE_API_KEY }}