bump version to 3.5.7

Author: Crhistian Ramirez

README.md

@@ -10,8 +10,8 @@ of your imagination.
 This SDK is automatically generated by the [Swagger Codegen](https://github.com/swagger-api/swagger-codegen) project:
 
 - API version: 1.0
-- Package version: 3.5.6
-- Build date: 2019-07-11T14:24:45.306-05:00
+- Package version: 3.5.7
+- Build date: 2019-08-23T14:46:45.294-05:00
 
 For more information, please visit [https://developer.ordercloud.io/documentation/](https://developer.ordercloud.io/documentation/getting-started/introduction-to-ordercloud)