For more details, see the release document: https://github.com/onelogin/python-saml/releases/tag/v2.2.0

(cherry picked from commit bec0aeeb42d9b30580eed51efcde2b089e3693c5)

TNL-4877

TNL-5083

ECOM-4641

It should help catch unicode encoding problems earlier.

This also updates python-saml dependency to a version that includes a
patch for unicode strings.

The new version includes some accessibilityy improvements.

This change fixes a problem with Vector Drawing problems where
Vectors and points can't be created by clicking and dragging on
the problem board.

New version includes fixes from https://github.com/edx/xblock-utils/pull/38 and https://github.com/edx/xblock-utils/pull/39.

- Cookie now includes users' enrollment info
- Removed user email address from cookie
- Refactored functions so that we can update this cookie on other pages
- Added six to ensure new code is compatible with Python 3.x

ECOM-4896

clear request cache to avoid memory leak

update to use https

delete courses in the same transaction as writing them

python3 compatibility

Also make sure we set the recommended settings according to
<https://django-debug-toolbar.readthedocs.io/en/stable/installation.html#explicit-setup>