Upgrade php_codesniffer

Author: lucasmichot

composer.json

@@ -26,7 +26,7 @@
         "illuminate/filesystem": "4.2.*",
         "phpunit/phpunit": "~4.0",
         "mockery/mockery": "~0.9",
-        "squizlabs/php_codesniffer": "~1.5"
+        "squizlabs/php_codesniffer": "~2.0"
     },
     "suggest": {
         "lucadegasperi/oauth2-server-laravel": "Use the League OAuth 2.0 server to protect your API.",