gha: replace set-output with GITHUB_OUTPUT

Fixes:
> `The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/`

.github/workflows/php-cs-fixer.yml

@@ -24,12 +24,12 @@ jobs:
 
       - name: Determine composer cache directory
         id: composer-cache
-        run: echo "::set-output name=directory::$(composer config cache-dir)"
+        run: echo "dir=$(composer config cache-dir)" >> $GITHUB_OUTPUT
 
       - name: Cache dependencies installed with composer
         uses: actions/cache@v4
         with:
-          path: ${{ steps.composer-cache.outputs.directory }}
+          path: ${{ steps.composer-cache.outputs.dir }}
           key: composer-${{ runner.os }}-${{ hashFiles('composer.json') }}
           restore-keys: |
             composer-${{ runner.os }}-

.github/workflows/phpstan.yml

@@ -36,7 +36,7 @@ jobs:
 
       - name: Get composer cache directory
         id: composercache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(composer config cache-dir)" >> $GITHUB_OUTPUT
 
       - name: Cache dependencies
         uses: actions/cache@v4

.github/workflows/phpunit.yml

@@ -92,7 +92,7 @@ jobs:
 
       - name: Get composer cache directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: echo "dir=$(composer config cache-dir)" >> $GITHUB_OUTPUT
 
       - name: Set Minimum PHP 8.0 Versions
         run: composer require phpunit/phpunit:^9.4 --no-interaction --no-progress --no-update