In team meeting 2023-01-26, we decided that we do not want to maintain methods anymore that are not directly or indirectly based on mersenne, or at least used inside one of other exposed faker methods (e.g. slugify is used in domainWord).

This affects helpers.unique and we will mark it as deprecated for removal.
There will no alternative given from inside faker, but maybe we can link to another npm package that can be used instead.