3.2.0: Add team api functions

Added get_team_submission_for_student to teams_api
Added get_team_submission_student_ids to teams_api

Fixed Django 3 deprecation warnings

• Fixed Django 3 deprecation warnings
• Bumped version to 3.1.12

3.1.11: Set score as an atomic transaction (#123)

* Set score as an atomic transaction
* Bump submissions version to 3.1.11

Return a team submission associated with a regular submission

Return a team submission associated with a regular submission

add reset_scores to teams api

add a function to the teams api to reset scores for a teams submission

improve docstring and tests

Clarify the expected values of team_member_id in create_submission_for_team

Fixing allow_tags attribute which is deprecated in Django 2.0

Fixing the issue allow_tags attribute which is deprecated in Django 2.0.

Added python 3.8 support

• Added pyhton 3.8 support
• Removed support for django's versions below 2.2

Return answer as part of team_api::get*

We need to return answer as part of all get* methods of the team_api. This is an ORA dependency.

Return answer as part of team_api::create_submission_for_team

We also need to return the answer as part of team_api::create_submission_for_team