adding ruby 2.4 testing and misc CHANGELOG fixups

Author: majormoses

.travis.yml

@@ -8,6 +8,7 @@ rvm:
 - 2.1
 - 2.2
 - 2.3.0
+- 2.4.1
 notifications:
   email:
     recipients:
@@ -30,4 +31,5 @@ deploy:
     rvm: 2.1
     rvm: 2.2
     rvm: 2.3.0
+    rvm: 2.4.1
     repo: sensu-plugins/sensu-plugins-graphite

CHANGELOG.md

@@ -1,11 +1,11 @@
-#Change Log
+# Change Log
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
 
-## [2.1.0]
+## [2.1.0] - 2017-06-11
 ### Changed
 - Disable filtering for handler-graphite-status.rb
 ### Fixed