Run tests with Python 3.7 (#590)

* Run tests with Python 3.7

* Update setup.py

* Remove travis
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3826ff6..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,51 +0,0 @@
-language: python
-sudo: false
-cache:
-  directories:
-  - ${HOME}/.cache
-matrix:
-  include:
-  - python: 2.7
-    env: TOXENV=py27-oauth2client1
-  - python: 2.7
-    env: TOXENV=py27-oauth2client2
-  - python: 2.7
-    env: TOXENV=py27-oauth2client3
-  - python: 2.7
-    env: TOXENV=py27-oauth2client4
-
-  - python: 3.4
-    env: TOXENV=py34-oauth2client1
-  - python: 3.4
-    env: TOXENV=py34-oauth2client2
-  - python: 3.4
-    env: TOXENV=py34-oauth2client3
-  - python: 3.4
-    env: TOXENV=py34-oauth2client4
-
-  - python: 3.5
-    env: TOXENV=py35-oauth2client1
-  - python: 3.5
-    env: TOXENV=py35-oauth2client2
-  - python: 3.5
-    env: TOXENV=py35-oauth2client3
-  - python: 3.5
-    env: TOXENV=py35-oauth2client4
-
-  - python: 3.6
-    env: TOXENV=py36-oauth2client1
-  - python: 3.6
-    env: TOXENV=py36-oauth2client2
-  - python: 3.6
-    env: TOXENV=py36-oauth2client3
-  - python: 3.6
-    env: TOXENV=py36-oauth2client4
-
-install:
-- pip install tox coveralls
-script:
-- tox
-after_success:
-  coveralls
-notifications:
-  email: false
diff --git a/setup.py b/setup.py
index 9ae3150..3575690 100644
--- a/setup.py
+++ b/setup.py
@@ -72,6 +72,7 @@
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
         'Development Status :: 5 - Production/Stable',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
diff --git a/tox.ini b/tox.ini
index c5e0e5f..35cb0ea 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,34,35,36}-oauth2client{1,2,3,4}
+envlist = py{27,34,35,36,37}-oauth2client{1,2,3,4}
 
 [testenv]
 deps =