Update CHANGELOG for v5.11
@@ -5,7 +5,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
and this project adheres to [Semantic
Versioning](http://semver.org/spec/v2.0.0.html).
-## Unreleased
+## [5.11.0] - 2019-07-10
### Added
- Silenced entries are now retrieved from the cache when determining if an event
