Add links to each release in CHANGELOG

Author: aaron-lane

CHANGELOG.md

@@ -16,5 +16,25 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 - the root module has been deprecated [#56]
 
+## [1.2.0] - 2019-07-30
+
+## [1.1.2] - 2019-06-14
+
+## [1.1.1] - 2019-03-15
+
+## [1.1.0] - 2019-02-28
+
+## [1.0.1] - 2019-02-14
+
+## [1.0.0] - 2019-02-14
+
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/1.1.2...v1.2.0
+[1.1.2]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/1.1.1...1.1.2
+[1.1.1]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/1.1.0...1.1.1
+[1.1.0]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/1.0.1...1.1.0
+[1.0.1]: https://github.com/terraform-google-modules/terraform-google-sql-db/compare/1.0.0...1.0.1
+[1.0.0]: https://github.com/terraform-google-modules/terraform-google-sql-db/releases/tag/1.0.0
+
 [#56]: https://github.com/terraform-google-modules/terraform-google-sql-db/pull/56
 [#43]: https://github.com/terraform-google-modules/terraform-google-sql-db/pull/43