Update Image.ANTIALIAS to Image.LANCZOS (Darwin)

Author: simonrob

lib/pystray/_darwin.py

@@ -171,7 +171,7 @@ def _assert_image(self):
                 size)
             source.paste(self._icon.resize(
                 size,
-                PIL.Image.ANTIALIAS))
+                PIL.Image.LANCZOS))
 
         # Convert the PIL image to an NSImage
         b = io.BytesIO()