[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/test_reader.py

@@ -3,6 +3,7 @@
 import pytest
 import zarr
 from numpy import ones, zeros
+
 from ome_zarr import NgffMultiscales
 from ome_zarr.data import create_zarr
 from ome_zarr.format import FormatV04