v0.31.0
Remove use of deprecated null_data_source @bwmetcalf (#94)
Moved logic from null_data_source into definition of locals.public_dns.
null_data_source is now deprecated (using tf 0.14.5) and throws warnings. See PR below.
https://registry.terraform.io/providers/hashicorp/null/latest/docs/data-sources/data_source