Django-auth-ldap

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- Dropped support for Django 3.0.

Breaking changes
^^^^^^^^^^^^^^^^

- Dropped deprecated setting ``AUTH_LDAP_CACHE_GROUPS``.
- Callables passed to ``AUTH_LDAP_SERVER_URI`` must now take a ``request`` positional argument.

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- Added support for Django 3.2.

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- Removed support for end of life Django 1.11. django-auth-ldap now requires
Django 2.2+.
- Removed support for end of life Python 3.5.
- Added support for Django 3.1.
- Added support for Python 3.9.
- Removed ``dev-requirements.txt`` in favor of :doc:`tox <tox:index>`.

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- Added support for the escape argument in ``LDAPSearchUnion.execute()``.

- Removed drepecated ``providing_args`` from ``Signal`` instances.

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- Reject authentication requests without a username.
- Added support for Django 3.0 and Python 3.8.
- Removed support for end of life Django 2.1.