Ability to specify multiple headers / regex matcher

[Vendicated]

Is your feature request related to a problem? Please describe

I would like to switch from https://github.com/Stuk/eslint-plugin-header to your library because Stuk's has a lot of bugs for me (and doesn't seem maintained anymore) and yours works way better

However, your library seems to not have a way to specify a regex matcher or multiple valid headers, which would be useful for a multitude of reasons:

• Variable year in header
• Ability to have different copyright holders per file
• Transition from verbose headers to shorter SPDX ones

Describe the solution you'd like

• The ability to specify multiple valid headers, for example by specifying an array of files
• The ability to specify some kind of regex matcher for whether a header is correct

Describe alternatives you've considered

For some of the above mentioned use cases, an alternative is to edit every single file, but that adds a lot of noise to git history, so this is not really something I want to do

[nikku]

Happy to take a contribution that incorporates that change.