Updated CHANGELOG

Author: IlCallo

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to `laravel-cloudfront-url-signer` will be documented in thi
 
 ## 0.1.1 - 2018-02-09
 
+- $expiration parameter of `sign()` helper now defaults to the value defined in the configuration file when not defined
+
+## 0.1.1 - 2018-02-09
+
 - Added `sign()` helper
 
 ## 0.1.0 - 2018-02-09