[perldoc] Contributors Pod::Weaver plugin does not work

[preaction]

When Pod::Weaver is being used by Dist::Zilla, it has a bunch more information from the distribution. The Dist::Zilla configuration file defines some information, and Dist::Zilla plugins can define more (plugins like Dist::Zilla::Git::Contributors).

If we want certain Pod::Weaver modules to work, we'll need to provide the same information to the weave_document method. We could either try to use Dist::Zilla to do it (reading the dist.ini file and doing whatever phase we need to do), or we could require users to provide that information in the app configuration.