Fix travis.yml (trusty > xenial)

niftylettuce · web-flow · commit 7ec4db22773b · 2019-09-13T10:10:42.000-05:00
Builds otherwise fail without this. Ref: <https://travis-ci.community/t/travis-is-downloading-older-chrome-versions-in-place-of-chrome-stable/5040/4>
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 sudo: required
-dist: trusty
+dist: xenial
 node_js:
   - 8
 addons:
