Update changelog for 6.1.2

Author: newmanw

CHANGELOG.md

@@ -3,10 +3,16 @@ All notable changes to this project will be documented in this file.
 Adheres to [Semantic Versioning](http://semver.org/).
 
 ---
-## 6.1.2 (TBD)
+## 6.1.3 (TBD)
 
 * TBD
 
+##### Features
+
+##### Bug Fixes
+
+## [6.1.2](https://github.com/ngageoint/mage-android/releases/tag/6.1.2) (06-25-2018)
+
 ##### Features
 * Beta Geopackage download feature.  Server administrators can now upload geopackages as layers
   and assign to specific events.  App users can choose to download available geopackages