Persistent-Hash 0.5 Latest
Add a META.yml to the distribution. Your buildtool should be able to autogenerate it.
Change the permissions of Build.PL/Makefile.PL to not-executable.
List all used modules in META.yml requires
Add a META.json to the distribution. Your buildtool should be able to autogenerate it.
Use the prompt() method from ExtUtils::MakeMaker/Module::Build.
Define the license if you are using in Build.PL. If you are using MakeMaker (Makefile.PL) you should upgrade to ExtUtils::MakeMaker version 6.31.
Add 'use warnings' (or its equivalents) to all modules, or convince us that your favorite module is well-known enough and people can easily see the modules warn when something bad happens.
Error: Persistent::Hash, Persistent::Hash::Dumper, Persistent::Hash::Storage::MySQL, Persistent::Hash::TestHash
Split the distribution, or fix the version numbers to make them consistent (use the highest version number to avoid version downgrade).
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.