Prepare 1.6

Author: rnixx

CHANGES.rst

@@ -1,8 +1,8 @@
 Changes
 =======
 
-1.6 (unreleased)
-----------------
+1.6
+---
 
 - Use raw string for regular expression.
   [rnix, 2020-05-28]

setup.py

@@ -8,7 +8,7 @@ def read_file(name):
         return f.read()
 
 
-version = '1.6.dev0'
+version = '1.6'
 shortdesc = 'An alternative to mixin-based extension of classes.'
 longdesc = '\n\n'.join([read_file(name) for name in [
     'README.rst',