update changelog

Author: smhg

CHANGELOG.md

@@ -4,6 +4,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/) 
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [2.0.0] - 2019-08-30
+### Changed
+- Format locale using hyphen instead of underscore (thx @benpptung)
+- Drop express 3.x support
+- Drop non-lts/latest node support (remove babel build)
+
+### Added
+- Warn about invalid configuration in non-production environment
+
 ## [1.2.0] - 2019-03-21
 ### Added
 - Module usage (`module` entry in package.json)
@@ -52,7 +61,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - First working version
 
-[Unreleased]: https://github.com/smhg/express-locale/compare/v1.2.0...HEAD
+[Unreleased]: https://github.com/smhg/express-locale/compare/v2.0.0...HEAD
+[2.0.0]: https://github.com/smhg/express-locale/compare/v1.2.0...v2.0.0
 [1.2.0]: https://github.com/smhg/express-locale/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/smhg/express-locale/compare/v1.0.5...v1.1.0
 [1.0.5]: https://github.com/smhg/express-locale/compare/v1.0.4...v1.0.5