Bump version to 0.2.0 in change log

Author: jonathansick

CHANGELOG.rst

@@ -1,13 +1,13 @@
 Change log
 ==========
 
-Unreleased
-----------
+0.2.0 (2021-03-23)
+------------------
 
 New configuration options from the command line:
 
 - ``--suffix`` option allows you to customize the suffix of the plain text mirror.
-- ``--header`` option allows you to add header content to the plain text file.
+- ``--header`` option allows you to add header content to the plain text mirror file.
 
 0.1.0 (2021-03-18)
 ------------------