[travis] use py3

diff --git a/.travis.yml b/.travis.yml
index 2ac2879eaf6ce1630b096f2c98179e55c71f6fe5..b747229eb541006f99ec7612d39ef44680572892 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: python
 python:
-  - "2.7"
+  - "3.7"
 virtualenv:
   system_site_packages: true