Add output parameters for the tool path and version

[tbroyer]

This allows calling the action multiple times in the
same job and retrieving the path and/or version in
other steps.

Fixes#65

[konradpabjan]

Looks good! Thanks for submitting this PR.

The only question I have is regarding this ::error:: syntax. Is there any benefit to doing this? I haven't seen any of our other first party actions use this (I want to maintain some level of consistency). Online I can't seen to find anything either.

[tbroyer]

This is https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message, as seen in @actions/core's error() too as an implementation detail.

Not sure about the throw in PowerShell though, but according to https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_throw?view=powershell-7 this should work too.

[konradpabjan]

I played around this, it makes the error message show up red in the logs so it's a pretty nice addition 😃

It doesn't fail the step though so exit 1 is still needed (for bash).

If Powershell it's redundant as throw will make the logs show up red and it will fail the step so the extra ::errror:: is not needed

[tbroyer]

Force-pushed with the PowerShell changes.

[konradpabjan]

Did some extra testing and everything is 👍

Thanks for the contribution @tbroyer 🎉🎈