message: Add support for .snupkg files
  These files contain debug symbols for `.nupkg` files.
diff: @@ -2684,7 +2684,7 @@ export const extensions: IFileCollection = {
  },
  {
  icon: 'nuget',
  - extensions: ['nupkg', 'nuspec', 'psmdcp'],
  + extensions: ['nupkg', 'snupkg', 'nuspec', 'psmdcp'],
  format: FileFormat.svg,
  },
  {
  