Adds CHANGELOG entries for #201 and #202

Author: weierophinney

CHANGELOG.md

@@ -6,7 +6,9 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Added
 
-- Nothing.
+- [#201](https://github.com/zendframework/zend-servicemanager/pull/201) and
+  [#202](https://github.com/zendframework/zend-servicemanager/pull/202) add
+  support for PHP versions 7.1 and 7.2.
 
 ### Deprecated