Add 2.0.0 to CHANGELOG

Author: aaron-lane

CHANGELOG.md

@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.0.0] - 2019-11-05
+
 ### Added
 
 - `subnetwork` variable.
@@ -30,7 +32,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [1.0.0] - 2017-08-28
 
-[Unreleased]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/1.0.4...HEAD
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/v2.0.0...HEAD
+[2.0.0]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/1.0.4...v2.0.0
 [1.0.4]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/1.0.3...1.0.4
 [1.0.3]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/1.0.2...1.0.3
 [1.0.2]: https://github.com/terraform-google-modules/terraform-google-lb-internal/compare/1.0.1...1.0.2