Add Python 3.7

.travis.yml

@@ -33,6 +33,8 @@ matrix:
       env: TOXENV=pypy
     - python: 3.6-dev
       env: TOXENV=py36dev
+    - python: 3.7-dev
+      env: TOXENV=py37dev
   allow_failures:
     - env: TOXENV=pypy
     - env: TOXENV=pypy3

setup.py

@@ -24,6 +24,7 @@ setup(
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ],

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py36, py35, py34, pypy, pypy3, py36dev
+envlist = py27, py36, py35, py34, pypy, pypy3, py36dev, py37dev
 recreate = False
 
 [testenv]