[AUTOMATED] Update terraform-null-label versions to support Terraform 0.13 (#67)

Author: Gowiem

main.tf

@@ -1,5 +1,5 @@
 module "label" {
-  source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.16.0"
+  source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.17.0"
   enabled     = var.enabled
   namespace   = var.namespace
   name        = var.name
@@ -12,7 +12,7 @@ module "label" {
 }
 
 module "user_label" {
-  source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.16.0"
+  source      = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.17.0"
   enabled     = var.enabled
   namespace   = var.namespace
   name        = var.name