registrar Dependencies Support for Django 2.2

Versions in registrar already support Django 2.2

• code-annotations

• django-cors-headers

• django-debug-toolbar

• django-dynamic-fixture

• django-extensions

• django-guardian

• django-model-utils

• django-mysql

• django-simple-history

• django-storages

• django-user-tasks

• django-waffle

• djangorestframework

• drf-jwt

• edx-auth-backends

• edx-django-release-util

• edx-django-utils

• edx-drf-extensions (https://openedx.atlassian.net/browse/BOM-1045)

• edx-i18n-tools

• edx-lint

• edx-opaque-keys

• pylint-django (https://openedx.atlassian.net/browse/BOM-1285)

• pytest-django

• social-auth-app-django (https://openedx.atlassian.net/browse/BOM-1286)

Support for Django 2.2 on master but not PyPI

• factory-boy (supports 2.1 in installed version, may just work)

Haven't been tested with Django 2.2 upstream

• rest-condition (negligible Django usage beyond DRF, may just work with 2.2)