Describe the bug
When I try to use a boolean value in my action.yaml file or workflow definition and retrieve it using core.getInput the result is a string.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://github.com/andrewdhazlett/gh-action-boolean-input-repro'
2. Click on 'Actions > gh-action-boolean-input-repro > Bug repro'
3. Scroll down to Run /./
4. See error

Expected behavior
No error is thrown, the input is interpreted as a boolean