• BREAKING: The raw attribute on the model classes has been replaced
  with a to_dict() method. This can be used to get a representation of
  the object that is suitable for serialization.
• BREAKING: The ip_address property on the model classes now always returns
  a ipaddress.IPv4Address or ipaddress.IPv6Address.
• BREAKING: The model and record classes now require all arguments other than
  locales and ip_address to be keyword arguments.
• BREAKING: geoip2.mixins has been made internal. This normally would not
  have been used by external code.
• IMPORTANT: Python 3.9 or greater is required. If you are using an older
  version, please use an earlier release.
• metro_code on geoip2.record.Location has been deprecated. The
  code values are no longer being maintained.
• The type hinting for the optional locales keyword argument now allows
  any sequence of strings rather than only list of strings.