Add Python 3.7 to the test matrix

Use xenial dist and sudo for the Python 3.7 builds.

.travis.yml

@@ -15,6 +15,10 @@ matrix:
           python: "3.5"
         - env: TOXENV=py36-django-21
           python: "3.6"
+        - env: TOXENV=py37-django-21
+          python: "3.7"
+          sudo: required
+          dist: xenial
         - env: TOXENV=py35-django-20
           python: "3.5"
         - env: TOXENV=py36-django-20
@@ -40,10 +44,18 @@ matrix:
           python: "3.5"
         - env: TOXENV=py36-django-21-postgres DATABASE_URL="postgres://postgres@localhost:5432/py36-django-21-postgres"
           python: "3.6"
+        - env: TOXENV=py37-django-21-postgres DATABASE_URL="postgres://postgres@localhost:5432/py37-django-21-postgres"
+          python: "3.7"
+          sudo: required
+          dist: xenial
         - env: TOXENV=py35-django-20-postgres DATABASE_URL="postgres://postgres@localhost:5432/py35-django-20-postgres"
           python: "3.5"
         - env: TOXENV=py36-django-20-postgres DATABASE_URL="postgres://postgres@localhost:5432/py36-django-20-postgres"
           python: "3.6"
+        - env: TOXENV=py37-django-20-postgres DATABASE_URL="postgres://postgres@localhost:5432/py37-django-20-postgres"
+          python: "3.7"
+          sudo: required
+          dist: xenial
         - env: TOXENV=py27-django-111-postgres DATABASE_URL="postgres://postgres@localhost:5432/py27-django-111-postgres"
           python: "2.7"
         - env: TOXENV=py36-django-111-postgres DATABASE_URL="postgres://postgres@localhost:5432/py36-django-111-postgres"

README.rst

@@ -46,10 +46,8 @@ recommended.  It follows the `Django's support policy`_, supporting:
 * Django 1.9 with Python 2.7, 3.4, or 3.5
 * Django 1.10 with Python 2.7, 3.4, or 3.5
 * Django 1.11 (LTS) with Python 2.7, 3.4, 3.5, or 3.6
-* Django 2.0 with Python 3.4, 3.5 or 3.6
-* Django 2.1 with Python 3.5 or 3.6
-
-Python 3.7 should work, but is untested in TravisCI.
+* Django 2.0 with Python 3.4, 3.5, 3.6, or 3.7
+* Django 2.1 with Python 3.5, 3.6, or 3.7
 
 .. _latest release: https://pypi.python.org/pypi/nose
 .. _Django's support policy: https://docs.djangoproject.com/en/1.8/internals/release-process/#supported-versions

setup.py

@@ -83,6 +83,7 @@ def get_long_description(title):
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Topic :: Software Development :: Testing'
     ]
 )