Terraform 0.12 (#20)

* Terraform 0.12

module-demo/securitygroup.tf

@@ -1,5 +1,5 @@
 resource "aws_security_group" "allow-ssh" {
-  vpc_id      = "${module.vpc.vpc_id}"
+  vpc_id      = module.vpc.vpc_id
   name        = "allow-ssh"
   description = "security group that allows ssh and all egress traffic"
 
@@ -17,7 +17,8 @@ resource "aws_security_group" "allow-ssh" {
     cidr_blocks = ["0.0.0.0/0"]
   }
 
-  tags {
+  tags = {
     Name = "allow-ssh"
   }
 }
+