• Previously, the py.typed file was not being added to the source
  distribution. It is now explicitly specified in the manifest.
• The type hints for the database file in the Reader constructor have
  been expanded to match those specified by maxmindb.open_database. In
  particular, os.PathLike and IO have been added.
• Corrected the type hint for the metadata() method on Reader. It
  will return a maxminddb.extension.Metadata if the C extension is being
  used.