As recommended by Kwalitee indicator metayml_has_license.
Currently we specify public domain even though it's not listed in
Module::Build::Api and arguably not a valid license at all. Maybe change
our license later, or classify as 'unrestricted'.
VERSION_FROM => 'PLP.pm',
PREREQ_PM => {},
ABSTRACT_FROM => 'PLP.pm',
+ (LICENSE => 'public domain') x ($ExtUtils::MakeMaker::VERSION > 6.30),
AUTHOR => 'Mischa POSLAWSKY <perl@shiar.org>',
);