Update changelog

CHANGELOG.md

@@ -1,3 +1,15 @@
+### 2.1.2 (2015-12-10)
+
+  * Bug fix - private properties were populatable directly on the instance, but not private properties of parent classes. Although this is an antipattern, if we're allowing it for the instance we should allow it up the chain.
+  * Fixed dependencies to allow Symfony3
+
+### 2.1.1 (2015-10-01)
+
+  * Bug fixes / cleanup in `Fixtures` static class
+  * Bug fix in `Reference` processor to enable parsing zero references
+  * Bug fix to handle default instance with no properties
+  * Performance improvements
+
 ### 2.1.0 (2015-09-06)
 
   * Added support for array parameters