[PyUP] Update factory-boy to 2.12.0

[pyup-bot]

This PR updates factory-boy from 2.10.0 to 2.12.0.

Changelog

2.12.0

-------------------

*New:*

 - Add support for Python 3.7
 - Add support for Django 2.1
 - Add :attr:`~factory.fuzzy.FuzzyChoice.getter` to :class:`~factory.fuzzy.FuzzyChoice` that mimics
   the behavior of ``getter`` in :class:`~factory.Iterator`
 - Make the ``extra_kwargs`` parameter of :meth:`~factory.faker.Faker.generate` optional
 - Add :class:`~factory.RelatedFactoryList` class for one-to-many support, thanks `Sean Harrington <https://github.com/seanharr11>`_.
 - Make the `locale` argument for :class:`~factory.faker.Faker` keyword-only

*Bugfix:*

 - Allow renamed arguments to be optional, thanks to `Justin Crown <https://github.com/mrname>`_.
 - Fix `django_get_or_create` behavior when using multiple fields with `unique=True`, thanks to `YPCrumble <https://github.com/YPCrumble>`

2.11.1

-------------------

*Bugfix:*

 - Fix passing deep context to a :class:`~factory.SubFactory` (``Foo(x__y__z=factory.Faker('name')``)

2.11.0

-------------------

*Bugfix:*

 - Fix :class:`~factory.fuzzy.FuzzyFloat` to return a 15 decimal digits precision float by default
 - :issue:`451`: Restore :class:`~factory.django.FileField` to a
   :class:`~factory.declarations.ParameteredAttribute`, relying on composition to parse the provided parameters.
 - :issue:`389`: Fix random state management with ``faker``.
 - :issue:`466`: Restore mixing :class:`~factory.Trait` and :meth:`~factory.post_generation`.

Links

• PyPI: https://pypi.org/project/factory-boy
• Changelog: https://pyup.io/changelogs/factory-boy/
• Repo: https://github.com/FactoryBoy/factory_boy

[pyup-bot]

Closing this in favor of #333