update changelog

Author: jfromaniello

Diff for: CHANGELOG.md

@@ -4,6 +4,21 @@
 All notable changes to this project will be documented in this file starting from version **v4.0.0**.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## 7.1.6 - 2016-07-15
+
+ - fix issue with buffer payload. closes #216 ([6b50ff324b4dfd2cb0e49b666f14a6672d015b22](https://github.com/auth0/node-jsonwebtoken/commit/6b50ff324b4dfd2cb0e49b666f14a6672d015b22)), closes [#216](https://github.com/auth0/node-jsonwebtoken/issues/216)
+
+
+## 7.1.5 - 2016-07-15
+
+ - update jws in package.json ([b6260951eefc68aae5f4ede359210761f901ff7a](https://github.com/auth0/node-jsonwebtoken/commit/b6260951eefc68aae5f4ede359210761f901ff7a))
+
+
+## 7.1.4 - 2016-07-14
+
+ - add redundant test ([bece8816096f324511c3efcb8db0e64b75d757a1](https://github.com/auth0/node-jsonwebtoken/commit/bece8816096f324511c3efcb8db0e64b75d757a1))
+ - fix an issue of double callback on error ([758ca5eeca2f1b06c32c9fce70642bf488b2e52b](https://github.com/auth0/node-jsonwebtoken/commit/758ca5eeca2f1b06c32c9fce70642bf488b2e52b))
+
 ## 7.1.2 - 2016-07-12
 
  - do not stringify the payload when signing async - closes #224 ([084f537d3dfbcef2bea411cc0a1515899cc8aa21](https://github.com/auth0/node-jsonwebtoken/commit/084f537d3dfbcef2bea411cc0a1515899cc8aa21)), closes [#224](https://github.com/auth0/node-jsonwebtoken/issues/224)