prepare for release 0.24.0-rc3

Signed-off-by: Miguel Molina <miguel@erizocosmi.co>

Author: erizocosmico

CHANGELOG.md

@@ -4,7 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## Unreleased
+
+## [0.24.0-rc3] - 2019-10-23
 
 ### Fixed