Add CHANGELOG entry for 0.2.0

Author: aaron-lane

CHANGELOG.md

@@ -7,11 +7,19 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [0.2.0] - 2019-05-30
+
+### Added
+
+- `instance_group` output on the `mig` submodule. [#10]
+
 ## [0.1.0] - 2019-04-30
 
 ### Added
 - `instance_template`, `mig`, and `umig` modules
 - examples, basic tests and fixtures for all modules
 
-[Unreleased]: https://github.com/terraform-google-modules/terraform-google-vm/compare/v0.1.0...HEAD
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-vm/compare/v0.2.0...HEAD
+[0.2.0]: https://github.com/terraform-google-modules/terraform-google-vm/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/terraform-google-modules/terraform-google-vm/releases/tag/v0.1.0
+[#10]: https://github.com/terraform-google-modules/terraform-google-vm/pull/10