Add support for Python 3.6, 3.7 and PyPy3

Author: hugovk

.travis.yml

@@ -4,7 +4,9 @@ python:
   - "2.7"
   - "3.5"
   - "3.6"
+  - "3.7"
   - "pypy"
+  - "pypy3"
 
 install:
   - pip install .

appveyor.yml

@@ -9,6 +9,12 @@ environment:
     - PYTHON: "C:\\Python35"
       TOX_ENV: "py35"
 
+    - PYTHON: "C:\\Python36"
+      TOX_ENV: "py36"
+
+    - PYTHON: "C:\\Python37"
+      TOX_ENV: "py37"
+
 
 init:
   - "%PYTHON%/python -V"

setup.py

@@ -17,6 +17,7 @@
     entry_points={'pytest11': ['echo = pytest_echo']},
     install_requires=['pytest>=2.2'],
     license="MIT License",
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*",
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Plugins',
@@ -33,5 +34,6 @@
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6'
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ])

tox.ini

@@ -1,11 +1,11 @@
 [tox]
-envlist=py{27,35,36}-pytest{30,31,32,33,34,35}
+envlist=py{27,35,36,37}-pytest{30,31,32,33,34,35}
 
 [testenv]
 deps =
     coverage
     py{27},pypy: django<2
-    py{35,36}: django>=2
+    py{35,36,37},pypy3: django>=2
     pytest30: pytest>=3.0,<3.1
     pytest31: pytest>=3.1,<3.2
     pytest32: pytest>=3.2,<3.3