CHANGELOG.md: Add information about 0.2.0

Author: nalenz-objectbox

CHANGELOG.md

@@ -1,4 +1,14 @@
 0.1.0 (2019-09-03)
 ------------------
 * Minimal Store setup
-* Minimal Box with put and get
+* Minimal Box with put and get
+
+0.2.0 (2019-09-10)
+------------------
+* UTF-8 support for Store and Box
+* 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