fix: Update manifest to exclude mptt stub in release package (#1367)

* Update manifest to exclude mptt stub

* Also exclude tests from package

* Update manifest

Author: fsbraun

MANIFEST.in

@@ -1,6 +1,8 @@
 include LICENSE
 include README.rst
+exclude mptt/__init__.py
 recursive-include filer/locale *
 recursive-include filer/static *
 recursive-include filer/templates *
 recursive-exclude * *.py[co]
+recursive-exclude tests *

filer/models/abstract.py

@@ -1,10 +1,10 @@
 import logging
 
-import easy_thumbnails.utils
 from django.db import models
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 
+import easy_thumbnails.utils
 from easy_thumbnails.VIL import Image as VILImage
 
 from .. import settings as filer_settings