Force the usage of opensoft/rollout:2.2.1 (#16)

Author: Jaspaul

composer.json

@@ -17,7 +17,7 @@
         "illuminate/console": "^5.4",
         "illuminate/database": "^5.4",
         "illuminate/support": "^5.4",
-        "opensoft/rollout": "^2.2"
+        "opensoft/rollout": "2.2.*"
     },
     "require-dev": {
         "codeclimate/php-test-reporter": "^0.4.4",