v2.0.0 remove experiment optional attribute

Terraform v0.14.0 introduced a new experimental language feature for declaring object type constraints with optional attributes in your module's input variables. Thanks to feedback from those who tried the experiment, a refinement of that functionality is now stablized in Terraform v1.3.
https://www.terraform.io/language/upgrade-guides#concluding-the-optional-attributes-experiment
Full Changelog: v1.0.0...v2.0.0

v1.0.0

What's Changed

• [v1.0.0] initial module implementation by @bryan-rhm in #1

New Contributors

• @bryan-rhm made their first contribution in #1

Full Changelog: https://github.com/bryan-rhm/terraform-aws-alb-target-group/commits/v1.0.0