Bump attrs from 17.3.0 to 18.1.0

[dependabot-preview]

Bumps attrs from 17.3.0 to 18.1.0.

Changelog

Sourced from attrs's changelog.

18.1.0 (2018-05-03)

Changes
^^^^^^^

• x=X(); x.cycle = x; repr(x) will no longer raise a RecursionError, and will instead show as X(x=...).

  #95 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/95>_

• attr.ib(factory=f) is now syntactic sugar for the common case of attr.ib(default=attr.Factory(f)).

  #178 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/178>,
  #356 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/356>

• Added attr.field_dict() to return an ordered dictionary of attrs attributes for a class, whose keys are the attribute names.

  #290 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/290>,
  #349 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/349>

• The order of attributes that are passed into attr.make_class() or the these argument of [**attr**](https://github.com/attr).s() is now retained if the dictionary is ordered (i.e. dict on Python 3.6 and later, collections.OrderedDict otherwise).

  Before, the order was always determined by the order in which the attributes have been defined which may not be desirable when creating classes programatically.

  #300 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/300>,
  #339 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/339>,
  #343 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/343>_

• In slotted classes, __getstate__ and __setstate__ now ignore the __weakref__ attribute.

  #311 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/311>,
  #326 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/326>

• Setting the cell type is now completely best effort.
  This fixes attrs on Jython.

  We cannot make any guarantees regarding Jython though, because our test suite cannot run due to dependency incompatabilities.

  #321 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/321>,
  #334 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/334>

• If attr.s is passed a these argument, it will not attempt to remove attributes with the same name from the class body anymore.

  #322 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/322>,
  #323 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/323>

• The hash of attr.NOTHING is now vegan and faster on 32bit Python builds.

  #331 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/331>,
  #332 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/332>

• The overhead of instantiating frozen dict classes is virtually eliminated.
  #336 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/336>_

• Generated __init__ methods now have an __annotations__ attribute derived from the types of the fields.

  #363 <https://github-redirect.dependabot.com/python-attrs/attrs/issues/363>_

• We have restructured the documentation a bit to account for attrs' growth in scope.
  Instead of putting everything into the examples <http://www.attrs.org/en/stable/examples.html>_ page, we have started to extract narrative chapters.

... (truncated)

Commits

• 9c3e07b Prepare 18.1.0
• 5b5a9c4 Use new slotted lingo
• db7c37e Add glossary & make slotted classes official (#371)
• 7a242a1 Mark error in example
• 29cc2ab Use \\ instead of a single \ in docstrings (#375)
• 7a80d57 Fix typo: double "be" (#373)
• 879f43d Add narrative chapter about initialization (#370)
• 7cb8c82 Support from typing import ClassVar (#367)
• 57817b2 Add a narrative chapter on object hashing (#369)
• 1163473 Extract strategies into proper module (#365)
• Additional commits viewable in compare view

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