provider update (#18)

Author: nitrocode

examples/complete/versions.tf

@@ -4,15 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 2.0"
-    }
-    template = {
-      source  = "hashicorp/template"
-      version = ">= 2.0"
-    }
-    null = {
-      source  = "hashicorp/null"
-      version = ">= 2.0"
+      version = ">= 3.0"
     }
   }
 }