Django-ditto

Fixed

- Fix Factory Boy imports and allow for Factory Boy v3

Changed

- Move all static files from `static/` to `static/ditto-core/`.

Changed

- About time we went to version 1.
- Allow for use of Django 3.1, django-taggit 1.3, pillow 7.2.
- Update included Bootstrap CSS from 4.5.0 to 4.5.2.

Changed

- Add flake8 to tests
- Upgrade Bootstrap CSS and JS from v4.4 to v4.5, and jQuery from 3.4.1 to 3.5.1.

Fixed

- Fix BOM/encoding error when fetching data from the Pinboard API

Changed

- Update devproject python dependencies
- Update Bootstrap CSS and JS from 4.1.1 to 4.4.1, Popper to 1.16, and jQuery from 3.3.1 to 3.4.1.

Fixed

- Fix character encoding issue with fetched Last.fm data

Removed

- Dropped support for Django 2.1. Now requires either Django 2.2 or 3.0.