feat: Make the module compatible with terraform 0.13

Author: terranisu

versions.tf

@@ -1,7 +1,10 @@
 terraform {
-  required_version = "~> 0.12.20"
+  required_version = ">= 0.12.20"
 
   required_providers {
-    aws = ">= 2.60"
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 2.60"
+    }
   }
 }