Add python 3.7 to tests

.travis.yml

@@ -21,6 +21,11 @@ matrix:
     - python: 3.6
       env: TOXENV=py36-django20
 
+    - python: 3.7
+      env: TOXENV=py37-django111
+    - python: 3.7
+      env: TOXENV=py37-django20
+
     - python: 3.6
       env: TOXENV=lint
 

setup.py

@@ -81,5 +81,6 @@ setup(
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ]
 )

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{27,34,35,36}-django111
-    py{34,35,36}-django20
+    py{27,34,35,36,37}-django111
+    py{34,35,36,37}-django20
     lint
 
 [testenv]