[Checkins] [zopefoundation/zope.interface] c50036: The ImmutableDeclaration also has immutable _v_attrs.

[Jason Madden]

  Branch: refs/heads/issue204
  Home:   https://github.com/zopefoundation/zope.interface
  Commit: c500360aaba5db30e5005664d14659ed7d8186ec
      https://github.com/zopefoundation/zope.interface/commit/c500360aaba5db30e5005664d14659ed7d8186ec
  Author: Jason Madden <jamadden at gmail.com>
  Date:   2020-04-07 (Tue, 07 Apr 2020)

  Changed paths:
    M CHANGES.rst
    M src/zope/interface/declarations.py
    M src/zope/interface/tests/test_declarations.py

  Log Message:
  -----------
  The ImmutableDeclaration also has immutable _v_attrs.

Fixes #204