tag for new release added

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]
+
+## [0.3.0] - 2020-06-11
 ### Added
 - Role for [tarantool/cartridge](https://github.com/tarantool/cartridge)
 - Documentaion and examples on [tarantool/http server](https://github.com/tarantool/http) middleware