CHANGES.md in xml-mapping_extensions-0.3.2 vs CHANGES.md in xml-mapping_extensions-0.3.3

@@ -1,4 +1,8 @@
+## 0.3.3
+
+- Fix issue where `StringIO` wasn't always implicitly `required`
+
 ## 0.3.2
 
 - Add `XML::Mapping#write_xml` and `XML::Mapping::ClassMethods#parse_xml`
 
 ## 0.3.1 (19 November 2015)