Update friendsofphp/php-cs-fixer dependency

Author: JaZo

composer.json

@@ -29,7 +29,7 @@
         "psr/http-message": "^1.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^2.10",
+        "friendsofphp/php-cs-fixer": "^2.14",
         "php-http/guzzle6-adapter": "^1.1",
         "phpunit/phpunit": "^6.0"
     },