travis: add python 3.{7,8} support

chenrui333 · chenrui333 · commit eb22a85510b1 · 2020-06-28T12:03:45.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,11 +1,11 @@
 language: python
 dist: xenial
-sudo: required
 python:
  - "2.7"
  - "3.6"
  - "3.7"
  - "3.7-dev"
+ - "3.8"
  - "3.8-dev"
 
 addons:
