refactor: explicitly require Hashicorp.terraform as a dep

.gitignore

@@ -2,4 +2,4 @@
 dist
 node_modules
 .DS_Store
-
+infracost-*.vsix

README.md

@@ -27,11 +27,9 @@ Check out the video below to see the Infracost extension in action!
 ## Getting started
 
 1. Install [Infracost CLI](https://www.infracost.io/docs/#1-install-infracost) on your machine & register for an API key.
-2. Open VSCode and install the [Hashicorp Terraform extension](https://marketplace.visualstudio.com/items?itemName=HashiCorp.terraform).
-   ![](https://github.com/infracost/vscode-infracost/blob/master/.github/assets/terraform-install.png?raw=true)
-3. Then install the [Infracost extension](https://marketplace.visualstudio.com/items?itemName=Infracost.infracost).
+2. Open VSCode and install the [Infracost extension](https://marketplace.visualstudio.com/items?itemName=Infracost.infracost). This will also install the the [Hashicorp Terraform extension](https://marketplace.visualstudio.com/items?itemName=HashiCorp.terraform) extension if you don't already have it.
    ![](https://github.com/infracost/vscode-infracost/blob/master/.github/assets/infracost-install.png?raw=true)
-4. Navigate to any Terraform file, if you've done the prior steps correctly you'll see costs above [supported blocks](https://www.infracost.io/docs/supported_resources/overview/).
+3. Navigate to any Terraform file, if you've done the prior steps correctly you'll see costs above [supported blocks](https://www.infracost.io/docs/supported_resources/overview/).
    ![](https://github.com/infracost/vscode-infracost/blob/master/.github/assets/maintf.png?raw=true)
 
 ## Requirements

package.json

@@ -2,7 +2,7 @@
 	"name": "infracost",
 	"displayName": "Infracost",
 	"description": "Cloud cost estimates for Terraform in your editor",
-	"version": "0.1.6",
+	"version": "0.1.7",
 	"publisher": "Infracost",
 	"license": "Apache-2.0",
 	"icon": "infracost-logo.png",
@@ -19,6 +19,9 @@
 		"terraform",
 		"hcl"
 	],
+	"extensionDependencies": [
+		"HashiCorp.terraform"
+	],
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/infracost/vscode-infracost.git"