Log Message:
py-django-extensions: updated to 2.2.1

2.2.1
Changes:
Fix: tests, support for newer versions of pytest
Fix: tests, disable test with drf dependency for older python versions

2.2.0
Changes:
Fix: removing wrongly released text_tags template
Fix: graph_models, support for Python <3.6
Improvement: ForeignKeySearchInput, wrap media files in static()
Improvement: UniqField, added tests
Improvement: dumpscript, fix orm_item_locator to use dateutil
Improvement: graph_models, added argument to change arrow_shape