replace abadonned dependency

Author: antograssiot

composer.json

@@ -27,7 +27,7 @@
         "psr/log": "~1.0",
         "easyrdf/easyrdf": "~0.9.0",
         "league/html-to-markdown": "~4.0",
-        "fabpot/php-cs-fixer": "~1.0"
+        "friendsofphp/php-cs-fixer": "~1.0"
     },
     "require-dev": {
         "doctrine/orm": "~2.2",