Finished release 0.49.

Changelog.md

@@ -2,6 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.49] - 2020-08-13
+- performance improvement /data/interfaces
+- refactored a new method for testability
+
 ## [0.48] - 2020-07-02
 - recover update gracefully in case of Kombu exceptions
 - update for IMS api changes