Release 0.9.0

Author: yngvar-antonsson

CHANGELOG.md

@@ -5,6 +5,8 @@ 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]
+
+## [0.9.0] - 2021-05-28
 ### Fixed
 - cartridge metrics role fails to start without http [#225](https://github.com/tarantool/metrics/issues/225)
 - quantile overflow after `fiber.yield()` [#235](https://github.com/tarantool/metrics/issues/235)