Switch to xenial on Travis
language: python
cache: pip
-dist: trusty
+dist: xenial
python: 3.6
stages:
@@ -55,10 +55,8 @@ jobs:
- env: GROUP=1
python: 3.8-dev
- dist: xenial
- env: GROUP=2
python: 3.8-dev
- dist: xenial
# It's okay to fail on the in-development CPython version.
fast_finish: true
