Change final_scores calculation and upgrade some dependencies

Bump django from 3.1.6 to 3.1.8 (#179)

Bumps [django](https://github.com/django/django) from 3.1.6 to 3.1.8.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.1.6...3.1.8)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Create Slack Group Chat, display mentor name, upgrade Django

Bump django from 3.1.1 to 3.1.6 (#175)

* Bump django from 3.1.1 to 3.1.6

Bumps [django](https://github.com/django/django) from 3.1.1 to 3.1.6.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.1.1...3.1.6)

Signed-off-by: dependabot[bot] <[email protected]>

* Upgrade Django

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Stefan Dworschak <[email protected]>

Adding hack_prep status

1.17

#M14. Misc cleanup changes and improvements (#168)

HMTL description and team distribution fix

1.16

Removing access to edit hackathon from users with is_staff

Dockerising for prod setup and adding extra stats page

1.15

#A15. As Admin, I would like to be able to view the participants of a…

Adding custom Slack Allauth provider and other bugfixes

1.14

#M14. Misc cleanup changes and improvements (#148)

Adding team/project views, updating scores and allowing to add awards, make profiles viewable to other users

1.13

#A09. As Admin, I would like to trigger an event to award the winning…

Hackathon detail view, update create/edit hackathon form and add view to create/change teams

1.12

#A05. As Admin, I would like to manually trigger an event that divide…

Judging automation - calculate and display total scores

Updated the check_projects_scores function so If all the projects were scored, it calculates the total score for each team, sorts the teams by scores and renders final_score.html with the score table.
If all projects weren't scored, it renders final_score.html without the score table.

Landing page, only display hackathons for user org and update hackathons functionality

1.10

#P04.2. Only display Hackathons where the org is CodeInstitute or whe…