v0.12.3

Add zone inputs, update tests, add usage @nitrocode (#42)

what

• Add zone inputs, update tests, add usage

why

• Verify zone name exists
• Dynamically retrieve zone name based on data source inputs

references

• https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/route53_zone
• Closes #41

git.io->cloudposse.tools update @dylanbannon (#40)

what and why

Change all references to git.io/build-harness into cloudposse.tools/build-harness, since git.io redirects will stop working on April 29th, 2022.

References

• DEV-143