Bump other setup.py deps for new Django 1.9 compatible releases

Author: vdboor

setup.py

@@ -41,9 +41,9 @@ def find_version(*parts):
     install_requires=[
         'django-fluent-utils>=1.2.3',      # DRY utility code
         'django-mptt>=0.5.5',              # Still supporting Django 1.5, use mptt 0.6 for Python 3 support.
-        'django-parler>=1.4',              # Needed for Django 1.8 compatibility
+        'django-parler>=1.6',              # Needed for Django 1.9 compatibility
         'django-polymorphic>=0.7',         # Needed for Django 1.8 compatibility
-        'django-polymorphic-tree>=1.1.2',  # Enforce Python 3 compatible versions
+        'django-polymorphic-tree>=1.2',    # Needed for Django 1.9 compatibility
         'django-tag-parser>=2.1',
         'future>=0.12.2',
         'six>=1.5.2',