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.

Fix MANIFEST (or MANIFEST.SKIP) to exclude dot directories from a distribution. Use an appropriate tool and avoid archiving your working directory by hand. If you switch your version control system, remove old VCS directories after you migrate.

Error: .github

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: SPVM::Sys, SPVM::Sys::FileTest, SPVM::Sys::IO, SPVM::Sys::IO::Constant, SPVM::Sys::IO::DirStream, SPVM::Sys::IO::Dirent, SPVM::Sys::IO::FileStream, SPVM::Sys::IO::Flock, SPVM::Sys::IO::PollfdArray, SPVM::Sys::IO::Stat, SPVM::Sys::IO::Utimbuf, SPVM::Sys::Process, SPVM::Sys::Process::Constant, SPVM::Sys::Process::Tms, SPVM::Sys::Socket, SPVM::Sys::Socket::Addrinfo, SPVM::Sys::Socket::Constant, SPVM::Sys::Socket::In6_addr, SPVM::Sys::Socket::In_addr, SPVM::Sys::Socket::Ip_mreq, SPVM::Sys::Socket::Ip_mreq_source, SPVM::Sys::Socket::Ipv6_mreq, SPVM::Sys::Socket::Sockaddr, SPVM::Sys::Socket::Sockaddr::In, SPVM::Sys::Socket::Sockaddr::In6, SPVM::Sys::Socket::Sockaddr::Storage, SPVM::Sys::Socket::Sockaddr::Un, SPVM::Sys::User, SPVM::Sys::User::Group, SPVM::Sys::User::Passwd

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.

Add a 'repository' resource to the META.yml via 'meta_add' accessor (for Module::Build) or META_ADD parameter (for ExtUtils::MakeMaker).

This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.