Update django-ordered-model to 3.6

[pyup-bot]

This PR updates django-ordered-model from 3.4.1 to 3.6.

Changelog

3.6

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- Add `serializers.OrderedModelSerializer` to allow Django Rest Framework to re-order models (251 264)
- Add tox builder for Django 4.0, drop building against 2.0 and 2.1 due to DRF compatibility.

3.5

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- Django 4.0 compatibility: Fix ChangeList constructor for Admin (256)
- Remove usage of `assertEquals` in tests (255)
- Add admin screenshots to README (245)
- Fix reorder command for custom order field models (257)

3.4.3

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- Fix packaging, setup.py was missing management command package path

3.4.2

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- Fix `OrderedTabularInline` for models with custom primary key field (233)
- Add management command `reorder_model` that can re-order most models with a broken ordering (240)
- Fix handling of keyword arguments passed to  `bulk_create` by Django 3 (235)
- Fix inline admin support for Proxy Models by adding parent model to url name (242)
- Migrated to GitHub Actions workflow (241)

Links

• PyPI: https://pypi.org/project/django-ordered-model
• Changelog: https://pyup.io/changelogs/django-ordered-model/
• Repo: http://github.com/django-ordered-model/django-ordered-model