Update deps

Author: PedroTroller

composer.json

@@ -4,7 +4,7 @@
     "license": "MIT",
     "require": {
         "php": ">=5.6",
-        "friendsofphp/php-cs-fixer": "^2.12"
+        "friendsofphp/php-cs-fixer": "~2.12@dev"
     },
     "require-dev": {
         "phpspec/phpspec": "^3.4",

src/PedroTroller/CS/Fixer/RuleSetFactory.php

@@ -191,7 +191,7 @@ public function enable($name, array $config = null)
     {
         return self::create(array_merge(
             $this->rules,
-            [$name => is_array($config) ? $config : true]
+            [$name => \is_array($config) ? $config : true]
         ));
     }