attempt to fix CI not using expected symfony version

.github/workflows/php.yml

@@ -1,4 +1,4 @@
-name: PHP Composer
+name: "CI Tests"
 
 on:
   push:
@@ -9,42 +9,54 @@ on:
 permissions:
   contents: read
 
+env:
+  fail-fast: true
+  PHPUNIT_FLAGS: "-v"
+  SYMFONY_DEPRECATIONS_HELPER: weak
+
 jobs:
   phpunit:
-    name: PHPUnit
     runs-on: ubuntu-latest
-
+    name: PHP v${{ matrix.php }} with Symfony v${{ matrix.symfony }}}
     strategy:
       matrix:
-        php-version:
-          - "7.4"
-          - "8.0"
-          - "8.1"
-          - "8.2"
-          - "8.3"
-        dependencies:
-          - "highest"
         include:
-          - php-version: "7.4"
-            dependencies: "lowest"
+          - { php: "7.4", symfony: "5.4.*", composer-flags: '--prefer-stable' }
+          - { php: "8.1", symfony: "6.4.*", composer-flags: '--prefer-stable' }
+          - { php: "8.2", symfony: "7.0.*", composer-flags: '--prefer-stable' }
+          - { php: "8.3", symfony: "7.*", composer-flags: '--prefer-stable' }
 
     steps:
-    - uses: actions/checkout@v3
-
-    - name: Validate composer.json and composer.lock
-      run: composer validate --strict
-
-    - name: Cache Composer packages
-      id: composer-cache
-      uses: actions/cache@v3
-      with:
-        path: vendor
-        key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-php-
-
-    - name: Install dependencies
-      run: composer install --prefer-dist --no-progress
-
-    - name: Run PHPUnit
-      run: vendor/bin/phpunit --coverage-clover=coverage.xml
+      - uses: actions/checkout@v2
+      - name: "Installing php"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: curl,mbstring,xdebug
+          ini-values: date.timezone="Europe/Prague"
+          coverage: xdebug
+          tools: "composer:v2,flex"
+
+      - name: Show PHP version
+        run: php -v && composer -V
+
+      - name: Download Composer cache dependencies from cache
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache Composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ matrix.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ matrix.os }}-composer-
+
+      - name: Install dependencies
+        run: |
+          perl -pi -e 's/^}$/,"minimum-stability":"dev"}/' composer.json
+          composer update ${{ matrix.composer-flags }} --prefer-dist
+        env:
+          SYMFONY_REQUIRE: "${{ matrix.symfony }}"
+
+      - name: Run PHPUnit
+        run: vendor/bin/phpunit --coverage-clover=coverage.xml