Update changelog

Author: dregad

docs/CHANGELOG.md

@@ -10,9 +10,13 @@ specification.
 
 # Releases for MantisBT 2.x
 
+## [2.1.3] - 2018-07-30
+
+Includes all changes and fixes from 1.5.7.
+
 ## [2.1.2] - 2018-06-13
 
-Includes all changes and fixes from 1.5.5.
+Includes all changes and fixes from 1.5.6.
 
 ### Fixed
 
@@ -352,9 +356,10 @@ Includes all changes and fixes from master-1.2.x branch, up to commit
 ## [0.9] - 2008-04-11
 
 
-[Unreleased 2.x]: https://github.com/mantisbt-plugins/source-integration/compare/v2.1.2...HEAD
+[Unreleased 2.x]: https://github.com/mantisbt-plugins/source-integration/compare/v2.1.3...HEAD
 [Unreleased 1.x]: https://github.com/mantisbt-plugins/source-integration/compare/v1.5.7...master-1.3.x
 
+[2.1.3]: https://github.com/mantisbt-plugins/source-integration/compare/v2.1.2...v2.1.3
 [2.1.2]: https://github.com/mantisbt-plugins/source-integration/compare/v2.1.1...v2.1.2
 [2.1.1]: https://github.com/mantisbt-plugins/source-integration/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/mantisbt-plugins/source-integration/compare/v2.0.3...v2.1.0