Perl extension for Package URL (aka "purl")

Changes for 2.11 - 2024-04-19

• Improved the cpan PURL type to be compatible with the 'PURL-TYPES' specification (giterlizzi/perl-URI-PackageURL#8 - https://github.com/package-url/purl-spec/blob/master/PURL-TYPES.rst)
• Added "luarocks" PURL type support
• Improved test suite (giterlizzi/perl-URI-PackageURL#11)
• Renamed CLI package in "URI::PackageURL::App"
• Changed JSON module pre-requisite to "JSON::PP" to be compatible with CPAN Toolchain (giterlizzi/perl-URI-PackageURL#12)