Update changelog for release v2.1.0

CHANGELOG.md

@@ -5,6 +5,8 @@ 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]
+
+## [2.1.0] - 2019-05-20
 ### Added
 - Support for `ansible_host_var` resource type
 - Support for `ansible_group_var` resource type
@@ -46,7 +48,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 - Update docs and package info for move back to GitHub.
 
-[Unreleased]: https://github.com/nbering/terraform-inventory/compare/v2.0.0...HEAD
+[Unreleased]: https://github.com/nbering/terraform-inventory/compare/v2.1.0...HEAD
+[2.1.0]: https://github.com/nbering/terraform-inventory/compare/v2.0.0...v2.1.0
 [2.0.0]: https://github.com/nbering/terraform-inventory/compare/v1.1.0...v2.0.0
 [1.1.0]: https://github.com/nbering/terraform-inventory/compare/v1.0.1...v1.1.0
 [1.0.1]: https://github.com/nbering/terraform-inventory/compare/v1.0.0...v1.0.1