Terraform 1.0 (#7)

* Upgrade to Terraform 1.0

* fix syntax

.gitignore

@@ -1,2 +1,3 @@
 .terraform/
+.terraform.lock.hcl
 terraform.tfstate*

README.md

@@ -1,7 +1,7 @@
 Terraforming 🌱 Heroku app
 ===========================
 
-[Terraform](https://www.terraform.io/) [0.12](https://www.hashicorp.com/blog/announcing-terraform-0-12) as a [Heroku](https://www.heroku.com/) app.
+[Terraform](https://www.terraform.io/) [1.0](https://www.hashicorp.com/blog/announcing-terraform-0-12) as a [Heroku](https://www.heroku.com/) app.
 
 Run Terraform CLI in the cloud:
 
@@ -11,7 +11,7 @@ heroku run terraform apply
 
 🔬🚧 This is a community proof-of-concept, [MIT license](LICENSE), provided "as is", without warranty of any kind.
 
-⭐️💁‍♀️ To use the [Terraform Postgres backend](https://www.terraform.io/docs/backends/types/pg.html), this app requires [Terraform 0.12](https://www.hashicorp.com/blog/announcing-terraform-0-12).
+⭐️💁‍♀️ Uses the [Terraform Postgres backend](https://www.terraform.io/docs/backends/types/pg.html).
 
 Set-up
 ------

backend.tf

@@ -0,0 +1,4 @@
+terraform {
+  backend "pg" {
+  }
+}

main.tf

@@ -1,12 +1,12 @@
 terraform {
-  backend "pg" {
+  required_providers {
+    heroku = {
+      source = "heroku/heroku"
+      version = "4.6.0"
+    }
   }
 }
 
-provider "heroku" {
-  version = "~> 2.0"
-}
-
 variable "example_app_name" {
   description = "Name of the Heroku app provisioned as an example"
 }
@@ -19,7 +19,7 @@ resource "heroku_app" "example" {
 resource "heroku_build" "example" {
   app = heroku_app.example.name
 
-  source = {
+  source {
     path = "app/"
   }
 }

versions.tf

@@ -1,4 +1,4 @@
 
 terraform {
-  required_version = ">= 0.12"
+  required_version = ">= 1.0"
 }