update tests

Author: ocefpaf

.travis.yml

@@ -7,15 +7,8 @@ python:
   - 3.4
   - 3.5
   - 3.6
-
-# Enable 3.7 without globally enabling sudo and dist: xenial for other build jobs
-# see this issue for updates https://github.com/travis-ci/travis-ci/issues/9815
-matrix:
-  fast_finish: true
-  include:
-    - python: 3.7
-      dist: xenial
-      sudo: true
+  - 3.7
+  - 3.8
 
 before_install:
   - pip install -r requirements-dev.txt
@@ -39,4 +32,4 @@ deploy:
     repo: jackmaney/python-stdlib-list
     tags: true
     all_branches: master
-    python: 3.6
+    python: 3.7