Add Travis configuration and badges (#13)

Author: Cito

README.md

@@ -3,6 +3,10 @@ Adds [GraphQL] support to your [aiohttp] application.
 
 Based on [flask-graphql] by [Syrus Akbary] and [sanic-graphql] by [Sergey Porivaev].
 
+[![PyPI version](https://badge.fury.io/py/aiohttp-graphql.svg)](https://badge.fury.io/py/aiohttp-graphql)
+[![Build Status](https://github.com/graphql-python/aiohttp-graphql.svg?branch=master)](https://github.com/graphql-python/aiohttp-graphql)
+[![Coverage Status](https://github.com/graphql-python/aiohttp-graphql/branch/master/graph/badge.svg)](https://github.com/graphql-python/aiohttp-graphql)
+
 ## Usage
 Just use the `GraphQLView` view from `aiohttp_graphql`
 

travis.yml

@@ -0,0 +1,18 @@
+language: python
+os:
+- linux
+python:
+- 3.6
+- 3.7
+- 3.8
+- pypy3
+cache:
+  directories:
+  - $HOME/.cache/pip
+install:
+- pip install -e .[test]
+- pip install pytest-cov codecov
+script:
+- python -m pytest --cov-branch --cov=aiohttp_graphql --cov-report=term-missing
+after_success:
+- codecov