Module::CoreList contains the hash of hashes %Module::CoreList::version,
this is keyed on perl version as indicated in $].  The second level hash
is module => version pairs.

It also contains %Module::CoreList::released hash, which has ISO formatted
versions of the release dates, as gleaned from the perlhist manpage.

WWW: http://search.cpan.org/dist/Module-CoreList/