Update version and copyright in config.py

Author: dpvc

conf.py

@@ -38,16 +38,16 @@
 
 # General information about the project.
 project = u'MathJax'
-copyright = u'2019 The MathJax Consortium'
+copyright = u'2021 The MathJax Consortium'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '3.1'
+version = '3.2'
 # The full version, including alpha/beta/rc tags.
-release = '3.1'
+release = '3.2'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.