Add note to changelog

wjohnstondrip · wjohnstondrip · commit 7a76a3b2e9e7 · 2018-07-20T09:37:32.000-05:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+* [#15](https://github.com/DripEmail/drip-php/pull/15) - Added `\Drip\Client#create_or_update_subscribers` method (@j831)
 * Your improvement here!
 
 ## 1.0.0
