Nuget packages namespace

The vast majority of nuget packages have "-" as namespace, and rightfully so, because nuget doesn't support namespacing (short of id prefix reservation: https://learn.microsoft.com/en-us/nuget/nuget-org/id-prefix-reservation). However there are about 900 packages in of `nuget` type in which namespace is present and not equal to "-". I've put those packages into a gist here: https://gist.github.com/RomanIakovlev/d6e3e36175c184c802d17f088c829d1b.

I think this is a bug in the crawler. I could try finding and fixing the problem, if given some guidance as of where to start.