If you are using Build.PL define the {requires}{perl} = VERSION field. If you are using MakeMaker (Makefile.PL) you should upgrade ExtUtils::MakeMaker to 6.48 and use MIN_PERL_VERSION parameter. Perl::MinimumVersion can help you determine which version of Perl your module needs.

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: Crypt::OpenPGP, Crypt::OpenPGP::Armour, Crypt::OpenPGP::Buffer, Crypt::OpenPGP::CFB, Crypt::OpenPGP::Certificate, Crypt::OpenPGP::Cipher, Crypt::OpenPGP::Ciphertext, Crypt::OpenPGP::Compressed, Crypt::OpenPGP::Config, Crypt::OpenPGP::Constants, Crypt::OpenPGP::Digest, Crypt::OpenPGP::ErrorHandler, Crypt::OpenPGP::Key, Crypt::OpenPGP::Key::Public, Crypt::OpenPGP::Key::Public::DSA, Crypt::OpenPGP::Key::Public::ElGamal, Crypt::OpenPGP::Key::Public::RSA, Crypt::OpenPGP::Key::Secret, Crypt::OpenPGP::Key::Secret::DSA, Crypt::OpenPGP::Key::Secret::ElGamal, Crypt::OpenPGP::Key::Secret::RSA, Crypt::OpenPGP::KeyBlock, Crypt::OpenPGP::KeyRing, Crypt::OpenPGP::KeyServer, Crypt::OpenPGP::MDC, Crypt::OpenPGP::Marker, Crypt::OpenPGP::Message, Crypt::OpenPGP::OnePassSig, Crypt::OpenPGP::PacketFactory, Crypt::OpenPGP::Plaintext, Crypt::OpenPGP::S2k, Crypt::OpenPGP::SKSessionKey, Crypt::OpenPGP::SessionKey, Crypt::OpenPGP::Signature, Crypt::OpenPGP::Signature::SubPacket, Crypt::OpenPGP::Trust, Crypt::OpenPGP::UserAttribute, Crypt::OpenPGP::UserID, Crypt::OpenPGP::Util, Crypt::OpenPGP::Words

Add all modules contained in this distribution to the META.yml field 'provides'. Module::Build or Dist::Zilla::Plugin::MetaProvides do this automatically for you.