Prepare bugfix release

Author: Cito

README.md

@@ -12,7 +12,7 @@ a query language for APIs created by Facebook.
 [![Python 3 Status](https://pyup.io/repos/github/graphql-python/graphql-core/python-3-shield.svg)](https://pyup.io/repos/github/graphql-python/graphql-core/)
 [![Code Style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)
 
-The current version 3.1.0 of GraphQL-core is up-to-date with GraphQL.js version 15.0.0.
+The current version 3.1.1 of GraphQL-core is up-to-date with GraphQL.js version 15.0.0.
 
 An extensive test suite with over 2100 unit tests and 100% coverage comprises a
 replication of the complete test suite of GraphQL.js, making sure this port is

docs/conf.py

@@ -61,7 +61,7 @@
 # The short X.Y version.
 # version = '3.1'
 # The full version, including alpha/beta/rc tags.
-version = release = '3.1.0'
+version = release = '3.1.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.