Enhance CI configuration and clean up test cases

- Updated CI workflow to exclude incompatible PHPUnit versions for PHP 8.1 and 8.2.
- Changed Composer command from install to update for better dependency management.
- Removed unnecessary `@covers` annotations from OpenAPISymfonySchemaValidatorTest for cleaner code.

Author: floriankraemer

.github/workflows/ci.yaml

@@ -12,6 +12,15 @@ jobs:
       matrix:
         php-version: ['8.1', '8.2', '8.3', '8.4']
         phpunit-version: ['10', '11', '12']
+        exclude:
+          # PHPUnit 11 requires PHP 8.2+
+          - php-version: '8.1'
+            phpunit-version: '11'
+          # PHPUnit 12 requires PHP 8.3+
+          - php-version: '8.1'
+            phpunit-version: '12'
+          - php-version: '8.2'
+            phpunit-version: '12'
 
     steps:
       - uses: actions/checkout@v4
@@ -27,10 +36,10 @@ jobs:
           coverage: pcov
 
       - name: Composer install
-        run: composer install --no-interaction --prefer-dist
+        run: composer update --no-interaction --prefer-dist
 
       - name: Install PHPUnit ${{ matrix.phpunit-version }}
-        run: composer require --dev phpunit/phpunit:^${{ matrix.phpunit-version }}.0 --no-interaction
+        run: composer require --dev phpunit/phpunit:^${{ matrix.phpunit-version }}.0 --no-interaction --update-with-dependencies
 
       - name: Run PHPUnit
         run: |
@@ -39,6 +48,7 @@ jobs:
           else
             bin/phpunit
           fi
+
       - name: Code Coverage Report
         if: success() && matrix.php-version == '8.3' && matrix.phpunit-version == '11'
         uses: codecov/codecov-action@v4

tests/OpenAPISymfonySchemaValidatorTest.php

@@ -44,9 +44,6 @@ public function testValidateSymfonyRequestFails(): void
         $this->validator->validateRequest($request);
     }
 
-    /**
-     * @covers \Phauthentic\PHPUnit\OpenAPIValidator\Symfony\OpenAPISymfonySchemaValidator
-     */
     #[Test]
     public function testValidateSymfonyResponsePasses(): void
     {
@@ -64,9 +61,6 @@ public function testValidateSymfonyResponsePasses(): void
         $this->assertTrue(true); // If no exception is thrown, the test passes.
     }
 
-    /**
-     * @covers \Phauthentic\PHPUnit\OpenAPIValidator\Symfony\OpenAPISymfonySchemaValidator
-     */
     #[Test]
     public function testValidateSymfonyResponseFails(): void
     {