Merge pull request #142 from canjs/landscaper/travis-xenial

Migrate to xenial in travis

Author: cherifGsoul

.travis.yml

@@ -1,13 +1,12 @@
 language: node_js
 node_js: node
-before_install:
-  - ./firefox-allow-popups.sh
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
 before_script:
   - npm run http-server &
   - sleep 2
 script: npm run ci
 addons:
-  firefox: "53.0"
+  firefox: '53.0'
   sauce_connect: true
+dist: xenial
+services:
+  - xvfb