fix: update test_properties.py to import _is_sparse_supported_reduction from lib

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Co-Authored-By: Claude <[email protected]>

Author: dcherian

tests/test_properties.py

@@ -17,8 +17,8 @@
 from hypothesis import assume, given, note, settings
 
 import flox
-from flox.core import _is_sparse_supported_reduction, groupby_reduce, groupby_scan
-from flox.lib import sparse_array_type
+from flox.core import groupby_reduce, groupby_scan
+from flox.lib import _is_sparse_supported_reduction, sparse_array_type
 from flox.xrutils import (
     _contains_cftime_datetimes,
     _to_pytimedelta,