CHANGELOG.md in sk_api_schema-0.10.6 vs CHANGELOG.md in sk_api_schema-0.11.0

@@ -1,9 +1,13 @@
 # SalesKing API Changelog
 
 See [commit messages](https://github.com/salesking/sk_api_schema/commits/) for details.
 Also sign up to our [Developer Newsletter](http://www.salesking.eu/dev/newsletter/) to stay up-to-date!
 
+##2017-05
+
+* Product remove lock_version
+
 ##2015-10
 
 * Update description to clarify number field decimal places length
 * Contact fix lead_ref/lead_source to be strings