Update changelog

Author: Roblinde

CHANGELOG.md

@@ -2,6 +2,12 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## Version [1.2.0]
+- Adds method `CreateEntryForLocaleAsync` to the management client.
+
+## Version [1.1.1]
+- Adds missing properties for the `SystemProperties` object.
+
 ## Version [1.1.0]
 - Adds convenience methods to `ContentfulManagementClient` for retrieveing, creating and updating entries without having to use `Entry<dynamic>`.