Run CI with Python 3.6 as well

Author: Cito

.travis.yml

@@ -1,19 +1,16 @@
 language: python
 
+dist: xenial
+sudo: true
+
 python:
   - 3.6
-# - 3.7  done in the matrix below
+  - 3.7
 
 install:
   - pip install pipenv
   - pipenv install --dev
 
-matrix:
-  include:
-    - python: 3.7
-      dist: xenial  # required for Python 3.7,
-      sudo: true  # see travis-ci/travis-ci#9069
-
 script:
   - flake8 graphql tests
   - mypy graphql

README.md

@@ -9,7 +9,7 @@ a query language for APIs created by Facebook.
 [![Build Status](https://travis-ci.org/graphql-python/graphql-core-next.svg?branch=master)](https://travis-ci.org/graphql-python/graphql-core-next)
 [![Coverage Status](https://coveralls.io/repos/github/graphql-python/graphql-core-next/badge.svg?branch=master)](https://coveralls.io/github/graphql-python/graphql-core-next?branch=master)
 [![Dependency Updates](https://pyup.io/repos/github/graphql-python/graphql-core-next/shield.svg)](https://pyup.io/repos/github/graphql-python/graphql-core-next/)
-[![Python 3 Status](https://pyup.io/repos/github/graphql-python/GraphQL-core-next/python-3-shield.svg)](https://pyup.io/repos/github/graphql-python/GraphQL-core-next/)
+[![Python 3 Status](https://pyup.io/repos/github/graphql-python/graphql-core-next/python-3-shield.svg)](https://pyup.io/repos/github/graphql-python/graphql-core-next/)
 
 The current version 1.0.0rc2 of GraphQL-core-next is up-to-date with GraphQL.js
 version 14.0.0rc2. All parts of the API are covered by an extensive test