Use the copyright holder in check

[Ana06]

I would like to use addlicense as linter in projects like capa and FLARE-VM to ensure all files have a header with Google LLC as copyright holder with addlicense -c "Google LLC" --check .. But at the moment it seems addlicense ignores the -c argument if the -check argument is provided. I would like that if both arguments are provided, it checks not only that there is a header, but also that the copyright holder is correct.