Pinned django-treebeard below 4.5 for tests due to introduced breaking changes (django-cms#6979)

Author: Aiky30

CHANGELOG.rst

@@ -10,6 +10,7 @@ Unreleased
 * Remove debug print from apphook_reload
 * Enforce use of coverage > 4 for python 3.8 support
 * Fixed 66622 bad Title.path in multilingual sites when parent slug is created or modified
+* Temporarily pinned django-treebeard to < 4.5, this avoids breaking changes introduced
 
 3.8.0 (2020-10-28)
 ==================

setup.py

@@ -9,7 +9,7 @@
     'Django>=2.2',
     'django-classy-tags>=0.7.2',
     'django-formtools>=2.1',
-    'django-treebeard>=4.3',
+    'django-treebeard>=4.3,<4.5',
     'django-sekizai>=0.7',
     'djangocms-admin-style>=1.2',
 ]

test_requirements/requirements_base.txt

@@ -2,7 +2,7 @@ coverage>=4
 python-coveralls>2.5.0
 unittest-xml-reporting==1.11.0
 Pillow==5.2.0
-django-treebeard>=4.3
+django-treebeard>=4.3,<4.5
 argparse
 dj-database-url
 djangocms-admin-style>=1.5