updated changelog.md

Author: rgupta24723

CHANGELOG.md

@@ -6,6 +6,10 @@
 #### Issues Fixed
 - [minor fixes OAuthClient.js](https://github.com/intuit/oauth-jsclient/pull/171)
 
+## [4.1.2](https://github.com/intuit/oauth-jsclient/tree/4.1.2)
+#### Issues Fixed
+- [fixed Error converting authResponse to JSON string](https://github.com/intuit/oauth-jsclient/pull/165)
+
 ## [4.1.1](https://github.com/intuit/oauth-jsclient/tree/4.1.1)
 #### Features 
 - Stop using Popsicle and start using Axios