chore: release 7.1.0 (#424)

* updated CHANGELOG.md [ci skip]

* updated README.md [ci skip]

CHANGELOG.md

@@ -6,6 +6,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Extending the adopted spec, each change should have a link to its corresponding pull request appended.
 
+## [7.1.0](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v7.0.0...v7.1.0) (2020-02-07)
+
+
+### Features
+
+* Add new Workload identity [submodule](./modules/workload-identity) ([#417](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/417)) ([b4bcfb9](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/b4bcfb9dd45d5f338b8b8366e7a6fc996c1973ae))
+
+
+### Bug Fixes
+
+* Change for_each splat syntax on update variants, closes [#414](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/414) ([#415](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/415)) ([a20425f](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/a20425f74b084ef58abb1560662ef1d83f3beee5))
+* If release_channel is active, set min_master_version to null ([#412](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/412)) ([4c7b399](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/4c7b3997d4e9ef38ef7c7fd629b7a1ff5ca0418e))
+* Prevents "Invalid index" when creating private cluster ([#422](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/422)) ([cc53d1c](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/cc53d1c5464ed4dfbc1e2c166aeaa93a2f79b561)), closes [#419](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/419)
+* Stop warning about deprecated external references from destroy provisioners. ([#420](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/issues/420)) ([c8fde26](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/commit/c8fde26dace1311163bee74fe61e67aa705a2245))
+
 ## [7.0.0](https://www.github.com/terraform-google-modules/terraform-google-kubernetes-engine/compare/v6.2.0...v7.0.0) (2020-01-29)