Bug #47803 for Module-Manifest: case-sensitive MANIFEST.SKIP

With Module::Manifest 0.07 and the three files below, running perl foo.pl prints 1, where I hoped $manifest->skipped would be false, ie. that devel/tz.c didn't match. ExtUtils::Manifest gives me the expected answer, ie. no skip, since it's case sensitive (only going case-insensitive on VMS, or something). It'd be good if Module::Manifest was the same. The difference makes Test::DistManifest complain about case-sensitive skips. (Maybe case-sensitive skipping is a bit dangerous if it doesn't really work on VMS. I think that's outside the scope of Module::Manifest, though potentially it could offer sensitive and insensitive skips methods, ready for some test module to use to see if a given dist manifest might have trouble in that area ...)