Meta: Use LTI 1.3

[Jonas-July]

Currently, the BP-tool uses LTI 1.1 via django-lti-provider.
As per IMS Global, LTI 1.1 is deprecated and should no longer be used. It is, however, still possible to use it with Moodle 4 (at the time of writing).

Moodle supports LTI 1.3/Advantage since 3.10.
The package django-lti-provider does not currently support 1.3. The last release is from half a year ago (called 1.0.0, but no major LTI changes), and the one before that is the currently used 0.4.7 from a year ago.

If this issue is pursued, it might be worth looking into PyLTI1p3. It has Django support and is actively maintained. It obviously supports LTI 1.3/Advantage.

LTI 2.0 is an older version than 1.3. Per above link, 2.0 is also deprecated.