Update changelog in preperatrion for release v0.9.5 (#62)

CHANGELOG.md

@@ -4,10 +4,18 @@ 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
+## [0.9.5] - 2020-07-28
 ### Added
-- Configurable `timeout` parameter for the `k8s_metadata_decorator`
-- New parameter `start_at` for journald input
+- Configurable `timeout` parameter for the `k8s_metadata_decorator` ([PR54](https://github.com/observIQ/carbon/pull/54))
+- Journald operator now supports `start_at` parameter ([PR55](https://github.com/observIQ/carbon/pull/55))
+
+### Changed
+- Enhanced plugin parameter metadata structure, to support required/optional and default values ([PR59](https://github.com/observIQ/carbon/pull/59))
+
+### Fixed
+- Issue where multiple instances of `syslog_parser` would cause parsing errors ([PR61](https://github.com/observIQ/carbon/pull/61))
+- `short destination buffer` error now is handled by increasing encoding buffer size ([PR58](https://github.com/observIQ/carbon/pull/58))
+- Issue where omitting the output field in a plugin could result in errors ([PR56](https://github.com/observIQ/carbon/pull/56))
 
 ## [0.9.4] - 2020-07-21
 - Allow omitting `id`, defaulting to plugin type if unique within namespace