[ci skip] update changelog with release date

Author: jeffgbutler

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 This log will detail notable changes to MyBatis Dynamic SQL. Full details are available on the GitHub milestone pages.
 
-## Release 1.1.3 - Unreleased
+## Release 1.1.3 - September 16, 2019
 
 GitHub milestone: [https://github.com/mybatis/mybatis-dynamic-sql/issues?q=milestone%3A1.1.3+](https://github.com/mybatis/mybatis-dynamic-sql/issues?q=milestone%3A1.1.3+)