Add wildcard and array support for the working_directory input

[dominikfoldi]

What would you like to be added:

It would be great to provide a wildcard pattern and an array of working directories to the working_directory input. Then the auditing would run in multiple directories and would add the report in one comment or in multiple comments.

Why is this needed:

We have a monorepo and use Lerna to manage it. We have multiple packages in multiple directories like packages and tools. Right now it would be a long list of steps in the workflow if we would want to configure every one of our packages to be audited by this action, plus every time when we add a new package, we would have to add a new step to have that package audited too.

Suggested input format:

 with:
  working_directory: |
    packages/*
    tools/*