Merge pull request #21 from tyler-technologies/fix-minimum-terraform-version-requirement

fix: make 0.12 minimum terraform cli version requirement so this module works with terraform version 0.13

Author: jim80net

versions.tf

@@ -1,7 +1,7 @@
 terraform {
-  required_version = "~> 0.12.0"
+  required_version = ">= 0.12, < 0.14"
 
   required_providers {
-    datadog = "~> 2.10"
+    datadog = ">= 2.10, < 3"
   }
 }