Next release version is 1.4.0, not 1.3.20

It's time for a minor version bump with our six dependency and "experimental"
Python 3 support.

beets/__init__.py

@@ -19,7 +19,7 @@ import os
 
 from beets.util import confit
 
-__version__ = u'1.3.20'
+__version__ = u'1.4.0'
 __author__ = u'Adrian Sampson <adrian@radbox.org>'
 
 

docs/changelog.rst

@@ -1,8 +1,8 @@
 Changelog
 =========
 
-1.3.20 (in development)
------------------------
+1.4.0 (in development)
+----------------------
 
 Some dependency notes for packagers:
 

docs/conf.py

@@ -15,8 +15,8 @@ master_doc = 'index'
 project = u'beets'
 copyright = u'2016, Adrian Sampson'
 
-version = '1.3'
-release = '1.3.20'
+version = '1.4'
+release = '1.4.0'
 
 pygments_style = 'sphinx'
 

setup.py

@@ -56,7 +56,7 @@ if 'sdist' in sys.argv:
 
 setup(
     name='beets',
-    version='1.3.20',
+    version='1.4.0',
     description='music tagger and library organizer',
     author='Adrian Sampson',
     author_email='adrian@radbox.org',