update context and tf .14 support (#79)

Author: woz5999

README.md

@@ -1,4 +1,6 @@
+<!-- markdownlint-disable -->
 # terraform-aws-tfstate-backend [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-aws-tfstate-backend.svg)](https://github.com/cloudposse/terraform-aws-tfstate-backend/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
+<!-- markdownlint-restore -->
 
 [![README Header][readme_header_img]][readme_header_link]
 
@@ -77,8 +79,15 @@ We literally have [*hundreds of terraform modules*][terraform_modules] that are
 ## Usage
 
 
-**IMPORTANT:** The `master` branch is used in `source` just as an example. In your code, do not pin to `master` because there may be breaking changes between releases.
-Instead pin to the release tag (e.g. `?ref=tags/x.y.z`) of one of our [latest releases](https://github.com/cloudposse/terraform-aws-tfstate-backend/releases).
+**IMPORTANT:** We do not pin modules to versions in our examples because of the
+difficulty of keeping the versions in the documentation in sync with the latest released versions.
+We highly recommend that in your code you pin the version to the exact version you are
+using so that your infrastructure remains stable, and update versions in a
+systematic way so that they do not catch you by surprise.
+
+Also, because of a bug in the Terraform registry ([hashicorp/terraform#21417](https://github.com/hashicorp/terraform/issues/21417)),
+the registry shows many of our inputs as required when in fact they are optional.
+The table below correctly indicates which inputs are required.
 
 
 
@@ -217,7 +226,7 @@ Available targets:
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0 |
+| terraform | >= 0.12.26 |
 | aws | >= 2.0 |
 | local | >= 1.3 |
 | template | >= 2.0 |
@@ -433,8 +442,10 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
 
 ### Contributors
 
+<!-- markdownlint-disable -->
 |  [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Maarten van der Hoef][maartenvanderhoef_avatar]][maartenvanderhoef_homepage]<br/>[Maarten van der Hoef][maartenvanderhoef_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Chris Weyl][rsrchboy_avatar]][rsrchboy_homepage]<br/>[Chris Weyl][rsrchboy_homepage] | [![John McGehee][jmcgeheeiv_avatar]][jmcgeheeiv_homepage]<br/>[John McGehee][jmcgeheeiv_homepage] | [![Oliver L Schoenborn][schollii_avatar]][schollii_homepage]<br/>[Oliver L Schoenborn][schollii_homepage] |
 |---|---|---|---|---|---|---|
+<!-- markdownlint-restore -->
 
   [aknysh_homepage]: https://github.com/aknysh
   [aknysh_avatar]: https://img.cloudposse.com/150x150/https://github.com/aknysh.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/0.21.0"
+  source  = "cloudposse/label/null"
+  version = "0.22.0" // requires Terraform >= 0.12.26
 
   enabled             = var.enabled
   namespace           = var.namespace

docs/terraform.md

@@ -3,7 +3,7 @@
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0 |
+| terraform | >= 0.12.26 |
 | aws | >= 2.0 |
 | local | >= 1.3 |
 | template | >= 2.0 |

examples/complete/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/0.21.0"
+  source  = "cloudposse/label/null"
+  version = "0.22.0" // requires Terraform >= 0.12.26
 
   enabled             = var.enabled
   namespace           = var.namespace

examples/complete/versions.tf

@@ -0,0 +1,18 @@
+terraform {
+  required_version = ">= 0.12.26"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 2.0"
+    }
+    local = {
+      source  = "hashicorp/local"
+      version = ">= 1.3"
+    }
+    template = {
+      source  = "hashicorp/template"
+      version = ">= 2.0"
+    }
+  }
+}

main.tf

@@ -152,7 +152,7 @@ resource "aws_s3_bucket_public_access_block" "default" {
 }
 
 module "dynamodb_table_label" {
-  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.21.0"
+  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.22.0"
   attributes = compact(concat(var.attributes, ["lock"]))
   context    = module.this.context
 }

versions.tf

@@ -1,5 +1,5 @@
 terraform {
-  required_version = ">= 0.12.0"
+  required_version = ">= 0.12.26"
 
   required_providers {
     aws = {