Upgrade PHP CS Fixer to v2

Author: keradus

composer.json

@@ -76,7 +76,7 @@
         "squizlabs/php_codesniffer": "1.5.3",
         "phpmd/phpmd": "@stable",
         "pdepend/pdepend": "2.4.0",
-        "friendsofphp/php-cs-fixer": "~1.2",
+        "friendsofphp/php-cs-fixer": "~2.1.1",
         "lusitanian/oauth": "~0.3 <=0.7.0",
         "sebastian/phpcpd": "2.0.0"
     },