bpo-36307: Travis: upgrade to Xenial environment (GH-12356)

diff --git a/.travis.yml b/.travis.yml
index c6e009291a2d9a2ef9e853c7d048910cd5f8326f..6d57ebb1d2fb9613447e5619346342a82a9d85cc 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: c
-dist: trusty
-sudo: false
+dist: xenial
 group: beta
 
 # To cache doc-building dependencies and C compiler output.