ci(travis-ci): Bump Travis env to Ubuntu Xenial

.travis.yml

@@ -1,17 +1,18 @@
 sudo: required
-dist: trusty
+dist: xenial
+addons:
+  apt:
+    sources:
+      - google-chrome
+    packages:
+      - google-chrome-stable
+services:
+  - xvfb
 language: node_js
 node_js:
 - '10.12.0'
 before_install:
-- export CHROME_BIN=/usr/bin/google-chrome
 - export DISPLAY=:99.0
-- sh -e /etc/init.d/xvfb start
-- sudo apt-get -qq update
-- sudo apt-get install -y libappindicator1 fonts-liberation
-- wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
-- sudo dpkg -i google-chrome*.deb
-- sleep 3
 before_script:
 # more heap mem per https://github.com/angular/angular-cli/issues/12645, https://github.com/npm/npm/issues/12238#issuecomment-367147962
 - export NODE_OPTIONS="--max_old_space_size=4096"