CHANGELOG.md: Fix order and mention contributor

Author: nalenz-objectbox

CHANGELOG.md

@@ -1,14 +1,14 @@
-0.1.0 (2019-09-03)
-------------------
-* Minimal Store setup
-* Minimal Box with put and get
-
-0.2.0 (2019-09-10)
+0.2.0 (2019-09-11)
 ------------------
-* UTF-8 support for Store and Box
+* UTF-8 support for Store and Box (thanks to [Buggaboo](https://github.com/Buggaboo) for [#14](https://github.com/objectbox/objectbox-dart/pull/14)!)
 * Bulk put and get functions (getMany, getAll, putMany)
 * Updated to objectbox-c 0.7
 * Basic Store options
 * Minimal unit tests
 * Removed reflection code, switched to model code generation instead
 * Minimal Flutter Desktop example for Dart 2.5.0
+
+0.1.0 (2019-09-03)
+------------------
+* Minimal Store setup
+* Minimal Box with put and get