Fix import sort order -- Linting

Author: BrianMichell

tests/test_v2.py

@@ -15,8 +15,8 @@
 from zarr.abc.store import Store
 from zarr.core.buffer.core import default_buffer_prototype
 from zarr.core.dtype import FixedLengthUTF32, VariableLengthUTF8
-from zarr.core.dtype.npy.structured import Struct
 from zarr.core.dtype.npy.bytes import NullTerminatedBytes
+from zarr.core.dtype.npy.structured import Struct
 from zarr.core.dtype.wrapper import ZDType
 from zarr.core.group import Group
 from zarr.core.sync import sync