Replace the discouraged File::Slurp::Tiny with File::Slurper. Thanx to Marcel Telka for the report. But why not use File::Slurp? Because... https://blogs.perl.org/users/leon_timmermans/2015/08/fileslurp-is-broken-and-wrong.html
Add a security policy file SECURITY.md
Update Makefile.PL to include both ExtUtils::MakeMaker and perl.