fix import

Author: gtfierro

btrdb/__init__.py

@@ -20,8 +20,8 @@
 from btrdb.exceptions import ConnectionError
 from btrdb.version import get_version
 from btrdb.utils.credentials import credentials_by_profile, credentials
+from btrdb.utils.ray import register_serializer
 from btrdb.stream import MINIMUM_TIME, MAXIMUM_TIME
-from btrdb.utils import register_serializer
 from warnings import warn
 
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