Update Travis config

Author: martndemus

.travis.yml

@@ -1,9 +1,10 @@
 ---
 language: node_js
 node_js:
-  - "0.12"
+  - "stable"
 
-sudo: false
+dist: trusty
+sudo: required
 
 addons:
   apt:
@@ -20,7 +21,6 @@ before_install:
   - "export DISPLAY=:99.0"
   - "sh -e /etc/init.d/xvfb start"
   - "npm config set spin false"
-  - "npm install -g npm@^2"
 
 install:
   - npm install -g bower

testem.js

@@ -4,10 +4,9 @@ module.exports = {
   "test_page": "tests/index.html?hidepassed",
   "disable_watching": true,
   "launch_in_ci": [
-    "PhantomJS"
+    "Chrome"
   ],
   "launch_in_dev": [
-    "PhantomJS",
     "Chrome"
   ]
 };