Merge pull request #2 from apfox/master

update dependency

Author: scaytrase

composer.json

@@ -16,7 +16,7 @@
   },
   "require": {
     "php": ">=5.3.3",
-    "kriswallsmith/buzz": "~0.13"
+    "kriswallsmith/buzz": "^0.16"
   },
   "require-dev": {
     "phpunit/phpunit": "~4.2@stable"