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: SVG::Graph, SVG::Graph::Data, SVG::Graph::Data::Datum, SVG::Graph::Data::Node, SVG::Graph::Data::Tree, SVG::Graph::File, SVG::Graph::Frame, SVG::Graph::Glyph, SVG::Graph::Glyph::axis, SVG::Graph::Glyph::bar, SVG::Graph::Glyph::barflex, SVG::Graph::Glyph::bezier, SVG::Graph::Glyph::bubble, SVG::Graph::Glyph::heatmap, SVG::Graph::Glyph::line, SVG::Graph::Glyph::pictogram, SVG::Graph::Glyph::scatter, SVG::Graph::Glyph::tree, SVG::Graph::Glyph::wedge

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.