Bump version to 0.21

README.rst

@@ -10,6 +10,10 @@ Misago
    :target: https://coveralls.io/github/rafalp/Misago?branch=master
    :alt: Test Coverage
 
+.. image:: https://img.shields.io/badge/release-0.21-brightgreen.svg
+   :target: https://pypi.org/project/Misago/
+   :alt: Release 0.21
+
 .. image:: https://img.shields.io/badge/python-3.7-blue.svg
    :target: https://travis-ci.org/rafalp/Misago
    :alt: Works on Python 3.7

misago/__init__.py

@@ -1,2 +1,2 @@
-__version__ = "0.20"
+__version__ = "0.21"
 __released__ = True