Update factory-boy to 2.12.0

[pyup-bot]

This PR updates factory-boy from 2.8.1 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`.

2.10.0

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

*Bugfix:*

 - :issue:`443`: Don't crash when calling :meth:`factory.Iterator.reset()` on a brand new iterator.

*New:*

 - :issue:`397`: Allow a :class:`factory.Maybe` to contain a :class:`~factory.PostGenerationDeclaration`.
   This also applies to :class:`factory.Trait`, since they use a :class:`factory.Maybe` declaration internally.

2.9.2

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

*Bugfix:*

 - Fix declaration corruption bug when a factory defined `foo__bar__baz=1` and a caller
   provided a `foo__bar=x` parameter at call time: this got merged into the factory's base
   declarations.

2.9.1

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

*Bugfix:*

 - Fix packaging issues (see https://github.com/zestsoftware/zest.releaser/issues/212)
 - Don't crash when debugging PostGenerationDeclaration

2.9.0

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

This version brings massive changes to the core engine, thus reducing the number of
corner cases and weird behaviourrs.

*New:*

 - :issue:`275`: `factory.fuzzy` and `factory.faker` now use the same random seed.
 - Add :class:`factory.Maybe`, which chooses among two possible declarations based
   on another field's value (powers the :class:`~factory.Trait` feature).
 - :class:`~factory.PostGenerationMethodCall` only allows to pass one positional argument; use keyword arguments for
   extra parameters.

*Deprecation:*

 - `factory.fuzzy.get_random_state` is deprecated, `factory.random.get_random_state` should be used instead.
 - `factory.fuzzy.set_random_state` is deprecated, `factory.random.set_random_state` should be used instead.
 - `factory.fuzzy.reseed_random` is deprecated, `factory.random.reseed_random` should be used instead.

Links

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