Bump version in CHANGELOG

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](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.2.0] - 2018-03-27
 
 * Bumped the minimum version of zendframework/zend-dom to 2.7, which includes a fix for attribute values that include spaces ([#13]).
 
@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 [Unreleased]: https://github.com/stevegrunwell/phpunit-markup-assertions/compare/master...develop
+[1.2.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.2.0
 [1.1.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.1.0
 [1.0.0]: https://github.com/stevegrunwell/phpunit-markup-assertions/releases/tag/v1.0.0
 [#6]: https://github.com/stevegrunwell/phpunit-markup-assertions/issues/6