fix: chrome headless travis

Author: Anthony Kirwan

.travis.yml

@@ -5,7 +5,7 @@ language: node_js
 node_js:
   - "6.11"
 
-sudo: false
+sudo: required
 
 cache:
   directories:

testem.js

@@ -1,20 +1,17 @@
 /*jshint node:true*/
 module.exports = {
-  "framework": "qunit",
-  "test_page": "tests/index.html?hidepassed",
-  "disable_watching": true,
-  "launch_in_ci": [
-    "Chrome"
-  ],
-  "launch_in_dev": [
-    "Chrome"
-  ],
-  "browser_args": {
+  framework: 'qunit',
+  test_page: 'tests/index.html?hidepassed',
+  disable_watching: true,
+  launch_in_ci: ['Chrome'],
+  launch_in_dev: ['Chrome'],
+  browser_args: {
     Chrome: [
       '--disable-gpu',
       '--headless',
+      '--no-sandbox',
       '--remote-debugging-port=9222',
-      '--window-size=1440,900'
-    ]
-  }
+      '--window-size=1440,900',
+    ],
+  },
 };