Updated to tf 0.13 and upgraded provider versions

versions.tf

@@ -1,10 +1,22 @@
 terraform {
-  required_version = "~> 0.12.0"
 
   required_providers {
-    aws      = "~> 2.0"
+    aws = {
-    template = "~> 2.0"
+      source  = "hashicorp/aws"
-    null     = "~> 2.0"
+      version = "~> 3.27"
-    local    = "~> 1.3"
     }
+    template = {
+      source  = "hashicorp/template"
+      version = "~> 2.2"
+    }
+    null = {
+      source  = "hashicorp/null"
+      version = "~> 3.0"
+    }
+    local = {
+      source  = "hashicorp/local"
+      version = "~> 2.0"
+    }
+  }
+  required_version = ">= 0.13"
 }