Change the permissions of Build.PL/Makefile.PL to not-executable.
Add a Changelog (best named 'Changes') to the distribution. It should list at least major changes implemented in newer versions.
Add a META.yml to the distribution. Your buildtool should be able to autogenerate it.
Remove the POD errors. You can check for POD errors automatically by including Test::Pod to your test suite.
Error: XUL-Image-PPT-0.03/lib/XUL/Image/PPT.pm -- Around line 101: Unknown directive: =SEE
This is not a critical issue. Currently mainly informative for the CPANTS authors. It might be removed later.