Update to newest version of github actions

.github/workflows/ci.yml

@@ -11,9 +11,9 @@ jobs:
         php-versions: ['8.2', '8.3']
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
       - name: Install JavaScript dependencies
@@ -27,9 +27,9 @@ jobs:
           extensions: mcrypt sqlite3
       - name: Get composer cache directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(php composer.phar config cache-files-dir)" >> $GITHUB_OUTPUT
       - name: Cache dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
           key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}