[skip ci] Add CHANGELOG entry for 3.0.0

Author: aaron-lane

CHANGELOG.md

@@ -8,6 +8,8 @@ Extending the adopted spec, each change should have a link to its corresponding
 
 ## [Unreleased]
 
+## [v3.0.0] - 2019-07-ZZ
+
 ### Added
 
 * Add configuration flag for enable BinAuthZ Admission controller [#160] [#188]
@@ -131,7 +133,8 @@ Extending the adopted spec, each change should have a link to its corresponding
 
 * Initial release of module.
 
-[Unreleased]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v2.1.0...HEAD
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v3.0.0...HEAD
+[v3.0.0]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v2.1.0...v3.0.0
 [v2.1.0]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v2.0.1...v2.1.0
 [v2.0.1]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v2.0.0...v2.0.1
 [v2.0.0]: https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v1.0.1...v2.0.0