Change root exports to match new patterns.

Author: andrew-chang-dewitt

db_wrapper/__init__.py

@@ -18,6 +18,5 @@
     Model instance.
 """
 from .connection import ConnectionParameters
-from .client import Client
-from .sync_client import Client as SyncClient
-from .model import Model, ModelData
+from .client import AsyncClient, SyncClient
+from .model import AsyncModel, SyncModel, ModelData