Support Python 3.7 and PyPy3

Author: johnthagen

.travis.yml

@@ -1,21 +1,24 @@
 language: python
 
 python:
+  - 3.7
+    dist: xenial
+    sudo: true
   - 3.6
   - 3.5
   - 3.4
   - 3.3
   - 2.7
   - pypy
+  - pypy3
 
 install:
   - pip install -r requirements.txt
   - pip install codecov
-  - pip install flake8 pep8-naming flake8-quotes flake8-import-order pylint
+  - pip install flake8 pep8-naming flake8-quotes flake8-import-order
 
 before_script:
   - flake8 --max-line-length=99 --import-order-style=google --application-import-names=cpplint_junit
-  - pylint -E cpplint_junit.py test.py
 
 script:
   python -Werror -Wignore::DeprecationWarning -m coverage run test.py

setup.py

@@ -35,6 +35,7 @@
         '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',
         'Topic :: Software Development :: Libraries :: Python Modules',