Fix usage of deprecated import path

Fix deprecated reference of util.memcache.safe_key (#113)

The correct import path is:
`common.djangoapps.util.memcache.safe_key`.

This is currently broken on Devstack and
stage.edx.org.

Bump version to 2.1.1

v2.1.0

Dropped support for python3.5

Version 2.0.4

• Release Using Github Actions

2.0.3: Merge pull request #94 from edx/feanil/update_version

We dropped all usage of six and future imports so this should now be pure python 3.x code. The previously dropped the dependency on six but was still referencing six in code which was causing issues.

Fix wrongly escaped links in admin view lists

Merge pull request #71 from regisb/regisb/fix-escaped-admin-links

Fix wrongly escaped links in admin view lists

Django and Python support updated

• Dropped support for python36.
• Dropped support for django<2.2.
• Added support for python3.8.

Django 2.2 Compatibility

Merge pull request #52 from edx/azarembok/django2

PROD-1118: Update django dependency for django2.

Django 2.0, 2.1, and 2.2 Compatibility

Django 2.0, 2.1, and 2.2 Compatibility

Django 2.0, 2.1, and 2.2 Compatibility

Django 2.0, 2.1, and 2.2 Compatibility

Fix auto-publishing to PyPI

No code change, just fixing the ability to auto publish to PyPI which was broken in v1.0.0