Bump the package version to 0.12.

Author: clokep

CHANGELOG.rst

@@ -3,8 +3,8 @@
 Changelog
 #########
 
-next (xxx)
-==========
+0.12 (2019-12-20)
+=================
 
 * [Incompatible change] Drop support for Python 2.7.
 * [Incompatible change] Drop support for Django 2.0 and 2.1.

setup.py

@@ -10,7 +10,7 @@ def long_description():
 setup(
     name='django-querysetsequence',
     packages=find_packages(),
-    version='0.11',
+    version='0.12',
     description='Chain together multiple (disparate) QuerySets to treat them as a single QuerySet.',
     long_description=long_description(),
     author='Percipient Networks, LLC',