Added support for the excludePackage option

[verenaroe]

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. Does your submission pass tests?
2. Have you lint your code locally prior to submission?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Pull Request Description

This PR fixes #217 and #93 and partially implements the excludePackage option. Let me know if I have to change something.

[icanhazstring]

Thanks for the PR 💪

After a quick glance over it, it looks good so far. Will have a deeper look at it asap.

[icanhazstring]

Just a small change needed, other than that, this PR is amazing. Thank you very much 🙏

[icanhazstring]

Thanks! LGTM 🚀

[verenaroe]

Thank you! 😀

[icanhazstring]

If you want, you can go for #93 as well :)
As you've implemented the groundwork for it already.

[verenaroe]

Yes I would love to! 😃