Support terraform v0.14 (#42)

* Support terraform v0.14, minimum terraform version now 0.12.26

README.md

@@ -1,4 +1,6 @@
+<!-- markdownlint-disable -->
 # terraform-aws-s3-log-storage [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-aws-s3-log-storage.svg)](https://github.com/cloudposse/terraform-aws-s3-log-storage/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
+<!-- markdownlint-restore -->
 
 [![README Header][readme_header_img]][readme_header_link]
 
@@ -322,8 +324,10 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
 
 ### Contributors
 
+<!-- markdownlint-disable -->
 |  [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Gonzalo Peci][pecigonzalo_avatar]][pecigonzalo_homepage]<br/>[Gonzalo Peci][pecigonzalo_homepage] |
 |---|---|---|---|
+<!-- markdownlint-restore -->
 
   [osterman_homepage]: https://github.com/osterman
   [osterman_avatar]: https://img.cloudposse.com/150x150/https://github.com/osterman.png

context.tf

@@ -18,8 +18,10 @@
 # will be null, and `module.this.delimiter` will be `-` (hyphen).
 #
 
+
 module "this" {
-  source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.19.2"
+  source  = "cloudposse/label/null"
+  version = "0.22.0" // requires Terraform >= 0.12.26
 
   enabled             = var.enabled
   namespace           = var.namespace