terraform: Update for 0.14 juju-provider (#201)

Ref #196

charms/argo-controller/terraform/README.md

@@ -2,6 +2,9 @@
 
 This is a Terraform module facilitating the deployment of argo-controller charm, using the [Terraform juju provider](https://github.com/juju/terraform-provider-juju/). For more information, refer to the provider [documentation](https://registry.terraform.io/providers/juju/juju/latest/docs). 
 
+## Compatibility
+This terraform module is compatible with charms of version >= 3.4 due to changes in the charm's relations.
+
 ## Requirements
 This module requires a `juju` model to be available. Refer to the [usage section](#usage) below for more details.
 
@@ -16,7 +19,7 @@ The module offers the following configurable inputs:
 | `channel`| string | Channel that the charm is deployed from | False |
 | `config`| map(string) | Map of the charm configuration options | False |
 | `model_name`| string | Name of the model that the charm is deployed on | True |
-| `resources`| map(number) | Map of charm resources revisions | False |
+| `resources`| map(string) | Map of the charm resources | False |
 | `revision`| number | Revision number of the charm name | False |
 
 ### Outputs

charms/argo-controller/terraform/variables.tf

@@ -21,10 +21,9 @@ variable "model_name" {
   type        = string
 }
 
-# TODO: Update to a map of strings, once juju provider 0.14 is released
 variable "resources" {
-  description = "Map of resources revisions"
-  type        = map(number)
+  description = "Map of resources"
+  type        = map(string)
   default     = null
 }
 

charms/argo-controller/terraform/versions.tf

@@ -3,7 +3,7 @@ terraform {
   required_providers {
     juju = {
       source  = "juju/juju"
-      version = "~> 0.13.0"
+      version = "~> 0.14.0"
     }
   }
 }