Log Message:
py-django2: updated to 2.1.1

2.1.1:
Bugfixes
Fixed a race condition in QuerySet.update_or_create() that could result in data loss
Fixed a regression where QueryDict.urlencode() crashed if the dictionary \ 
contains a non-string value
Fixed a regression in Django 2.0 where using manage.py test --keepdb fails on \ 
PostgreSQL if the database exists and the user doesn’t have permission to \ 
create databases
Fixed a regression in Django 2.0 where combining Q objects with __in lookups and \ 
lists crashed
Fixed translation failure of DurationField’s “overflow” error message
Fixed a regression where the admin change form crashed if the user doesn’t \ 
have the ‘add’ permission to a model that uses TabularInline
Fixed a regression where a related_query_name reverse accessor wasn’t set up \ 
when a GenericRelation is declared on an abstract base model
Fixed the test client’s JSON serialization of a request data dictionary for \ 
structured content type suffixes
Made the admin change view redirect to the changelist view after a POST if the \ 
user has the ‘view’ permission
Fixed admin change view crash for view-only users if the form has an extra form field
Fixed a regression in Django 2.0.5 where QuerySet.values() or values_list() \ 
after combining querysets with extra() with union(), difference(), or \ 
intersection() crashed due to mismatching columns
Fixed crash if InlineModelAdmin.has_add_permission() doesn’t accept the obj \ 
argument