chore: release 0.4.0 (#20)

* chore: updated CHANGELOG.md [ci skip]

* chore: updated README.md

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

CHANGELOG.md

@@ -7,6 +7,19 @@ The format is based on
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.0](https://www.github.com/terraform-google-modules/terraform-google-sap/compare/v0.3.0...v0.4.0) (2020-07-27)
+
+
+### Features
+
+* Adding the option public_ip that will allow to disable the external IP ([#16](https://www.github.com/terraform-google-modules/terraform-google-sap/issues/16)) ([52ef304](https://www.github.com/terraform-google-modules/terraform-google-sap/commit/52ef304cb583f64fedf13749ecd37467af4ac01d))
+* Adding the option to create instance with a static private IP ([#25](https://www.github.com/terraform-google-modules/terraform-google-sap/issues/25)) ([d8a5752](https://www.github.com/terraform-google-modules/terraform-google-sap/commit/d8a57529bab3caa004cb2017c34e077f56b0d344))
+
+
+### Bug Fixes
+
+* Repair wrong disk sizes for HANA VMs issue [#18](https://www.github.com/terraform-google-modules/terraform-google-sap/issues/18) ([#23](https://www.github.com/terraform-google-modules/terraform-google-sap/issues/23)) ([9bb69ed](https://www.github.com/terraform-google-modules/terraform-google-sap/commit/9bb69ed3abaafbc069eb18ad0382d9975e499a21))
+
 ## [0.3.0](https://www.github.com/terraform-google-modules/terraform-google-sap/compare/v0.2.0...v0.3.0) (2020-05-04)