* BREAKING CHANGES:
- The deprecated ``city_isp_org()`` and ``omni()`` methods
have been removed.
- The ``geoip2.database.Reader`` lookup methods (e.g., ``city()``,
``isp()``) now raise a ``TypeError`` if they are used with a database that
does not match the method. In particular, doing a ``city()`` lookup on a
GeoIP2 Country database will result in an error and vice versa.
* A ``metadata()`` method has been added to the ``geoip2.database.Reader``
class. This returns a ``maxminddb.reader.Metadata`` object with information
about the database.