PYTHON-1782 Restore backwards compatibility of MongoClient initialization when passing a type_registry

Author: prashantmital

pymongo/mongo_client.py

@@ -98,9 +98,9 @@ def __init__(
             host=None,
             port=None,
             document_class=dict,
-            type_registry=None,
             tz_aware=None,
             connect=None,
+            type_registry=None,
             **kwargs):
         """Client for a MongoDB instance, a replica set, or a set of mongoses.