Simplify type check

Author: oschwald

HISTORY.rst

@@ -8,6 +8,8 @@ History
 
 * The public API on ``geoip2.database`` is now explicitly defined by
   setting ``__all__``.
+* The return type of the ``metadata()`` method on ``Reader`` is now
+  ``maxminddb.reader.Metadata`` rather than a union type.
 
 4.3.0 (2021-09-20)
 ++++++++++++++++++

geoip2/database.py

@@ -269,7 +269,7 @@ def _flat_model_for(
 
     def metadata(
         self,
-    ) -> Union[maxminddb.reader.Metadata, "maxminddb.extension.Metadata"]:
+    ) -> maxminddb.reader.Metadata:
         """The metadata for the open database.
 
         :returns: :py:class:`maxminddb.reader.Metadata` object

requirements.txt

@@ -1,4 +1,4 @@
 aiohttp>=3.6.2,<4.0.0
-maxminddb>=2.1.0,<3.0.0
+maxminddb>=2.2.0,<3.0.0
 requests>=2.24.0,<3.0.0
 urllib3>=1.25.2,<2.0.0