Merge pull request #827 from alxpy/py37

Add Python3.7 to CI

Author: syrusakbary

.travis.yml

@@ -9,6 +9,10 @@ matrix:
       python: 3.5
     - env: TOXENV=py36
       python: 3.6
+    - env: TOXENV=py37
+      python: 3.7
+      dist: xenial
+      sudo: true
     - env: TOXENV=pypy
       python: pypy-5.7.1
     - env: TOXENV=pre-commit