Update composer.json

Author: Eugene Matvejev

composer.json

@@ -23,7 +23,7 @@
     "require": {
         "php": ">= 5.5.9",
         "leafo/lessphp": "^0.5",
-        "leafo/scssphp-compass": "dev-master"
+        "leafo/scssphp-compass": "@dev"
     },
     "require-dev": {
         "composer/composer": "^1.1",