Added CHANGELOG for #24

Author: weierophinney

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
-## 3.0.1 - TBD
+## 3.0.1 - 2016-02-18
 
 ### Added
 
@@ -18,7 +18,8 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
-- Nothing.
+- [#24](https://github.com/zendframework/zend-eventmanager/pull/24) updates the
+  zend-stdlib dependency to `^2.7.3 || ^3.0`, allowing either major version.
 
 ## 3.0.0 - 2016-01-12