* add new plugin wif fields to AWS Secrets Engine
* add changelog
* go get awsutil v0.3.0
* fix up changelog
* fix test and field parsing helper
* godoc on new test
* require role arn when audience set
* make fmt
---------
Co-authored-by: Austin Gebauer <agebauer@hashicorp.com>
Co-authored-by: Austin Gebauer <34121980+austingebauer@users.noreply.github.com>