run PHP CS Fixer on Travis

Author: keradus

.gitignore

@@ -3,6 +3,7 @@
 !/bin/validate-json
 coverage
 .buildpath
+.php_cs.cache
 .project
 .settings
 composer.lock

.php_cs

@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\CS\Config\Config;
+use Symfony\CS\FixerInterface;
+
+$config = Config::create()
+    ->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
+    ->setUsingCache(true)
+    ->setUsingLinter(false);
+
+$finder = $config->getFinder()
+    ->in(__DIR__);
+
+return $config;

.travis.yml

@@ -21,3 +21,4 @@ script:
   - cd docs && make linkcheck && cd ..
   - vendor/bin/phpdoc.php -d src -t docs-api
   - vendor/bin/phpunit --coverage-text
+  - vendor/bin/php-cs-fixer fix --dry-run --diff --verbose

composer.json

@@ -40,6 +40,7 @@
     },
     "require-dev": {
         "json-schema/JSON-Schema-Test-Suite": "1.1.0",
+        "fabpot/php-cs-fixer": "~1.6",
         "phpunit/phpunit": "~3.7",
         "phpdocumentor/phpdocumentor": "~2"
     },