Add codeception run to Travis CI

Author: VolCh

.php_cs.dist

@@ -15,6 +15,7 @@ $finder = PhpCsFixer\Finder::create()
     ->exclude('var')
     ->exclude('public/bundles')
     ->exclude('public/build')
+    ->exclude('tests') // Codeception & Symfony coding standards are different
 ;
 
 return PhpCsFixer\Config::create()

.travis.yml

@@ -26,9 +26,11 @@ before_install:
 install:
   - composer install
   - ./vendor/bin/simple-phpunit install
+  - ./vendor/bin/codecept build
 
 script:
   - ./vendor/bin/simple-phpunit
+  - ./vendor/bin/codecept run
   # this checks that the source code follows the Symfony Code Syntax rules
   - '[[ "$TRAVIS_PHP_VERSION" == "nightly" ]] || ./vendor/bin/php-cs-fixer fix --diff --dry-run -v'
   # this checks that the YAML config files contain no syntax errors