Bump *two* version numbers, fantastic.
diff --git a/doc/conf.py b/doc/conf.py
index ea0baf9..be9784b 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -51,9 +51,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '0.12'
+version = '0.13'
 # The full version, including alpha/beta/rc tags.
-release = '0.12'
+release = '0.13'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.