Update setup.py and tox settings

Author: jkimbo

setup.py

@@ -1,33 +1,37 @@
 from setuptools import setup, find_packages
 
 required_packages = [
-    'graphql-core>=2.1,<3',
-    'graphql-server-core>=1.1.1,<2',
-    'sanic>=0.5.1',
+    "graphql-core>=2.1,<3",
+    "graphql-server-core>=1.1.1,<2",
+    "sanic>=0.5.1",
 ]
 
+tests_require = ["pytest>=2.7.3", "aiohttp>=1.3.0", "yarl>=0.9.6", "jinja2>=2.9.0"]
+
 setup(
-    name='Sanic-GraphQL',
-    version='1.1.0',
-    description='Adds GraphQL support to your Sanic application',
-    long_description=open('README.rst').read(),
-    url='https://github.com/graphql-python/sanic-graphql',
-    download_url='https://github.com/graphql-python/sanic-graphql/releases',
-    author='Sergey Porivaev',
-    author_email='porivaevs@gmail.com',
-    license='MIT',
+    name="Sanic-GraphQL",
+    version="1.1.0",
+    description="Adds GraphQL support to your Sanic application",
+    long_description=open("README.rst").read(),
+    url="https://github.com/graphql-python/sanic-graphql",
+    download_url="https://github.com/graphql-python/sanic-graphql/releases",
+    author="Sergey Porivaev",
+    author_email="porivaevs@gmail.com",
+    license="MIT",
     classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Intended Audience :: Developers',
-        'Topic :: Software Development :: Libraries',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
-        'License :: OSI Approved :: MIT License',
+        "Development Status :: 5 - Production/Stable",
+        "Intended Audience :: Developers",
+        "Topic :: Software Development :: Libraries",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "License :: OSI Approved :: MIT License",
     ],
-    keywords='api graphql protocol sanic',
-    packages=find_packages(exclude=['tests']),
+    keywords="api graphql protocol sanic",
+    packages=find_packages(exclude=["tests"]),
     install_requires=required_packages,
-    tests_require=['pytest>=2.7.3', 'aiohttp>=1.3.0', 'yarl>=0.9.6', 'jinja2>=2.9.0'],
+    tests_require=tests_require,
+    extras_require={"test": tests_require},
     include_package_data=True,
-    platforms='any',
+    platforms="any",
 )

tox.ini

@@ -1,26 +1,13 @@
 [tox]
-envlist = py35, py36, flake8
+envlist = flake8,py36,py37,py38
 skipsdist = true
 
-[travis]
-python =
-    3.5: py35, flake8
-    3.6: py36, flake8
-
 [testenv]
 deps =
-    pytest>=2.7.2
-    graphql-core>=1.0
-    graphql-server-core>=1.0.dev
-    sanic>=0.3.1
-    aiohttp>=1.3.0
-    jinja2>=2.9.0
-    yarl>=0.9.6
-    pytest-runner
-    coverage
+    .[test]
 
 commands =
-        coverage run --source=sanic_graphql setup.py test
+    {posargs:py.test --cov=sanic_graphql tests}
 
 [testenv:flake8]
 deps = flake8