Pylint

- Improvement in error message for ``missing-backwards-migration-callable``
(Bryan Mutai)
- Start testing with Django 3.1 on Python 3.8
- Better error message when Django is not configured. Closes 277

- Rely on Django to resolve string references in ForeignKey fields. Refs 243 (Alejandro Angulo)
- Suppress unused-argument for functions in migration modules. Fix 267
- New checker for hard-coded auth.User. Fix 244

- New checker to warn about missing backwards data migrations (Bryan Mutai)
- Rename ``pylint_django.checkers.db_performance`` to
``pylint_django.checkers.migrations``
- Add URL to project Changelog for PyPI (Ville Skyttä)
- Fix failing test suite b/c of missing CSV dialect. Fix
`268 <https://github.com/PyCQA/pylint-django/issues/268>`_
(Alejandro Angulo)

- Do not report error for ``gettext_lazy`` (Antonin MOREL)

- Add support for Django 3.0 and Python 3.8 (Wayne Lambert)
- Support ASGI. Fix 258 (Sander Maijers)

- Suppress ``too-many-ancestors`` for class-based generic views
- Add ``handler400``, ``handler403``, ``handler404`` to good_names. Fix
248