fixed composer.json require

Author: cmpan

composer.json

@@ -1,7 +1,7 @@
 {
   "name" : "windwork/util",
   "description" : "windwork util component，Windwork 工具组件",
-  "version" : "0.3.0",
+  "version" : "0.3.1",
   "require" : {
     "php" : ">=5.5.0",
     "windwork/core" : "*",
@@ -10,7 +10,7 @@
     "windwork/logger" : "*",
     "windwork/storage" : "*",
     "windwork/template" : "*",
-    "windwork/email" : "*",
+    "windwork/mailer" : "*",
     "windwork/web" : "*"
   },
   "license" : "MIT",