docs: Bump version to 1.9.3.

docs/conf.py

@@ -98,7 +98,7 @@ copyright = '2014-2017, Damien P. George, Paul Sokolovsky, and contributors'
 #
 # We don't follow "The short X.Y version" vs "The full version, including alpha/beta/rc tags"
 # breakdown, so use the same version identifier for both to avoid confusion.
-version = release = '1.9.2'
+version = release = '1.9.3'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.