Prepare CHANGELOG for 0.8.1 version

CHANGELOG.md

@@ -4,7 +4,7 @@ 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]
+## [0.8.1] - 2019-02-20
 ### Fixed
 - Fix the default JavaScript timeout being too high (was 83 minutes, is now 5 seconds)
 
@@ -72,7 +72,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Add "JsonApiSteps" trait for sending, receiving and asserting JSON data
 
-[Unreleased]: https://github.com/exozet/behat-utils/compare/0.8.0...HEAD
+[0.8.1]: https://github.com/exozet/behat-utils/compare/0.8.0...0.8.1
 [0.8.0]: https://github.com/exozet/behat-utils/compare/0.7.1...0.8.0
 [0.7.1]: https://github.com/exozet/behat-utils/compare/0.7.0...0.7.1
 [0.7.0]: https://github.com/exozet/behat-utils/compare/0.6.0...0.7.0