Release 0.6.1 on the tails of 0.6.0

CHANGELOG.rst

 Changes
 =======
+0.6.1 - 2018-05-06
+------------------
+
+* Fix N804 check for ``cls`` used in metaclass methods (See also
+  https://github.com/PyCQA/pep8-naming/issues/53)
+
 0.6.0 - 2018-05-04
 ------------------

src/pep8ext_naming.py

@@ -12,7 +12,7 @@ try:
 except ImportError:
     from flake8.util import ast, iter_child_nodes
-__version__ = '0.6.0'
+__version__ = '0.6.1'
 LOWERCASE_REGEX = re.compile(r'[_a-z][_a-z0-9]*$')
 UPPERCASE_REGEX = re.compile(r'[_A-Z][_A-Z0-9]*$')