update context and tf .14 support (#95)

Co-authored-by: actions-bot <58130806+actions-bot@users.noreply.github.com>

README.md

@@ -64,8 +64,15 @@ 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-elasticache-redis/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.
 
 
 
@@ -153,7 +160,7 @@ Available targets:
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0 |
+| terraform | >= 0.12.26 |
 | aws | >= 2.0 |
 | null | >= 2.0 |
 

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

docs/terraform.md

@@ -3,7 +3,7 @@
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12.0 |
+| terraform | >= 0.12.26 |
 | aws | >= 2.0 |
 | null | >= 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/0.19.2"
+  source  = "cloudposse/label/null"
+  version = "0.22.0" // requires Terraform >= 0.12.26
 
   enabled             = var.enabled
   namespace           = var.namespace

examples/complete/versions.tf

 terraform {
-  required_version = ">= 0.12.0"
+  required_version = ">= 0.12.26"
 
   required_providers {
-    aws  = ">= 2.0"
-    null = ">= 2.0"
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 2.0"
+    }
+    null = {
+      source  = "hashicorp/null"
+      version = ">= 2.0"
+    }
   }
 }

main.tf

@@ -159,7 +159,7 @@ resource "aws_cloudwatch_metric_alarm" "cache_memory" {
 }
 
 module "dns" {
-  source = "git::https://github.com/cloudposse/terraform-aws-route53-cluster-hostname.git?ref=tags/0.7.0"
+  source = "git::https://github.com/cloudposse/terraform-aws-route53-cluster-hostname.git?ref=tags/0.8.0"
 
   enabled  = module.this.enabled && var.zone_id != "" ? true : false
   dns_name = var.dns_subdomain != "" ? var.dns_subdomain : module.this.id

versions.tf

 terraform {
-  required_version = ">= 0.12.0"
+  required_version = ">= 0.12.26"
 
   required_providers {
-    aws  = ">= 2.0"
-    null = ">= 2.0"
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 2.0"
+    }
+    null = {
+      source  = "hashicorp/null"
+      version = ">= 2.0"
+    }
   }
 }