Travis CI: Update to Xenial (#14286)

(bionic doesn't include g++7 ppa)
6 years ago · 1aa60bce32
1 changed files with 1 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -1,4 +1,4 @@
-dist: trusty
+dist: xenial
 sudo: require

 language: python