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

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

Author: pre-commit-ci[bot]

tests/instruments/test_drifter.py

@@ -5,8 +5,8 @@
 
 import numpy as np
 import xarray as xr
-
 from parcels import FieldSet
+
 from virtualship.instruments.drifter import Drifter, DrifterInstrument
 from virtualship.models import Location, Spacetime
 from virtualship.models.expedition import Waypoint