update for 8.6.0-beta2 release

Author: jmckenna

conf.py

@@ -92,9 +92,9 @@ def __getattr__(cls, name):
 # built documents.
 #
 # The short X.Y version.
-version = '8.4'
+version = '8.6'
 # The full version, including alpha/beta/rc tags.
-release = '8.4.1'
+release = '8.6.0-beta2'
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #language = None