Reorder importorskip

Author: ianthomas23

datashader/tests/test_mpl_ext.py

@@ -1,6 +1,8 @@
 from __future__ import annotations
 import pytest
 
+pytest.importorskip("matplotlib")
+
 import matplotlib
 matplotlib.use("Agg")
 
@@ -11,8 +13,6 @@
 import datashader as ds
 from datashader.mpl_ext import dsshow
 
-pytest.importorskip("matplotlib")
-
 
 df = pd.DataFrame(
     {