Fix Pillow ANTIALIAS deprecation warning

Author: codingjoe

setup.cfg

@@ -63,7 +63,7 @@ norecursedirs=venv env .eggs
 DJANGO_SETTINGS_MODULE=tests.settings
 addopts = --cov=stdimage --nomigrations --tb=short
 filterwarnings =
-    ignore:DeprecationWarning
+    error
 
 [coverage:run]
 source = .

stdimage/models.py

@@ -11,6 +11,7 @@
     ImageFileDescriptor,
 )
 from PIL import Image, ImageFile, ImageOps
+from PIL.Image import Resampling
 
 from .validators import MinSizeValidator
 
@@ -186,7 +187,7 @@ class StdImageField(ImageField):
         "width": None,
         "height": None,
         "crop": False,
-        "resample": Image.ANTIALIAS,
+        "resample": Resampling.LANCZOS,
     }
 
     def __init__(

tests/test_utils.py

@@ -1,7 +1,7 @@
 import os
 
 import pytest
-from PIL import Image
+from PIL.Image import Resampling
 
 from stdimage.utils import render_variations
 from tests.models import ManualVariationsModel
@@ -24,7 +24,7 @@ def test_render_variations(self, image_upload_file):
                     "width": 150,
                     "height": 150,
                     "crop": True,
-                    "resample": Image.ANTIALIAS,
+                    "resample": Resampling.LANCZOS,
                 }
             },
         )