update mysql version and changelog file

Author: cristianciutea

CHANGELOG.md

@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Next Release (date TBD)
+
+## 1.1.5 (2018-12-05)
+
 ### Fixed
 - Issue where the plugin returned metrics when only inventory was requested.
 

src/mysql.go

@@ -11,7 +11,7 @@ import (
 
 const (
 	integrationName    = "com.newrelic.mysql"
-	integrationVersion = "1.1.3"
+	integrationVersion = "1.1.5"
 )
 
 type argumentList struct {