Log Message:
py-djangocms-picture: updated to 2.1.1

2.1.1:
Added reference variables to migrations
Fixed a text typo in models

2.1.0:
Removed support for Django 1.8, 1.9, 1.10

2.0.8:
Fixed an issue where default DJANGOCMS_PICTURE_RESPONSIVE_IMAGES was not in settings

2.0.7:
Add responsive image support
Add support for Django 2.0 and 2.1
Fix swappable filer image model support

2.0.6:
Fixed a misleading link to MDN inside code documentation
Abstract the link model so it can be extended by other addons

2.0.5:
Fixed an issue in DJANGOCMS_PICTURE_ALIGN where "Align center" pointed \ 
to the wrong value
Updated translations

2.0.4:
Prevent changes to DJANGOCMS_PICTURE_XXX settings from requiring new migrations
Changed naming of Aldryn to Divio Cloud
Adapted testing infrastructure (tox/travis) to incorporate django CMS 3.4 and \ 
dropped 3.2
Fixed an issue when no image is set after deletion in django-filer \ 
(on_delete=SET_NULL)
Updated translations

2.0.3:
Fixed an issue with picture_link not working as expected in the template
Fixed an issue where the alt text was not displayed appropriately
Fixed an issue where placeholder params can be strings

2.0.2:
Fixed an issues with migrations where Null values caused IntegrityError

2.0.1:
Fixes an issue where images throw an AttributeError