Bump to 0.12.1 and add tfversions badge

Author: yorinasub17

.circleci/config.yml

@@ -8,7 +8,7 @@ defaults: &defaults
     KUBERGRUNT_VERSION: v0.3.8
     HELM_VERSION: v2.12.2
     MODULE_CI_VERSION: v0.13.12
-    TERRAFORM_VERSION: 0.12.0
+    TERRAFORM_VERSION: 0.12.1
     TERRAGRUNT_VERSION: NONE
     PACKER_VERSION: NONE
     GOLANG_VERSION: 1.11.2

README.md

@@ -1,5 +1,6 @@
 [![Maintained by Gruntwork.io](https://img.shields.io/badge/maintained%20by-gruntwork.io-%235849a6.svg)](https://gruntwork.io/?ref=repo_terraform_kubernetes_helm)
 [![GitHub tag (latest SemVer)](https://img.shields.io/github/tag/gruntwork-io/terraform-kubernetes-helm.svg?label=latest)](https://github.com/gruntwork-io/terraform-kubernetes-helm/releases/latest)
+![Terraform Version](https://img.shields.io/badge/tf-%3E%3D0.12.0-blue.svg)
 
 # Tiller Module