Updated CHANGELOG for zendframework#45, zendframework#55, and zendfra…

…mework#56

- Each of which have been merged to this patch.

CHANGELOG.md

@@ -15,12 +15,17 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Removed
 
-- Nothing.
+- [#55](https://github.com/zendframework/zend-validator/pull/55) removes
+  obsolete code targeting PHP versions prior to 5.4.
 
 ### Fixed
 
+- [#45](https://github.com/zendframework/zend-validator/pull/45) fixes aliases
+  mapping the deprecated `Float` and `Int` validators to their `Is*` counterparts.
 - [#49](https://github.com/zendframework/zend-validator/pull/49) updates the
   code to work with the upcoming zend-servicemanager v3.
+- [#56](https://github.com/zendframework/zend-validator/pull/56) fixes the regex
+  in the `Ip` validator to escape `.` characters used as IP delimiters.
 
 ## 2.5.4 - TBD