source: bump version

Signed-off-by: Rohit Yadav <rohit@apache.org>

Author: yadvr

source/conf.py

@@ -61,9 +61,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '4.11'
+version = '4.12'
 # The full version, including alpha/beta/rc tags.
-release = '4.11.0.0'
+release = '4.12.0.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.