Support outputs#35

[MChorfa]

What does this change

This PR will bridge the output gap that is available in other mixins

What issue does it fix

Closes # (#35 )

Checklist

• [x] Unit Tests
• [x] Documentation
• [x] Schema (porter.yaml)

If this is your first pull request, please add your name to the bottom of our Contributors list. Thank you for making Porter better! 🙇‍♀️

[vdice]

/azp run porter-helm

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[vdice]

/azp run porter-helm

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).