chore(travis): Fix build (xvfb)

.travis.yml

@@ -1,20 +1,25 @@
 language: node_js
 
 node_js:
-  - 4.1
+  - 6
+
+# Ubuntu 14 Trusty is old, and Travis might stop supporting it at some point,
+# so we need to figure out how to get xvfb working on Ubuntu 16 and newer:
+# https://docs.travis-ci.com/user/gui-and-headless-browsers/#sts=Using%20xvfb%20to%20Run%20Tests%20That%20Require%20a%20GUI%20#
+dist: trusty
 
 before_install:
   - export CHROME_BIN=chromium-browser
   - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
 
 before_script:
-  - npm install -g gulp
+  - npm install -g gulp-cli
 
 script:
   - npm install
-  - gulp build
-  - gulp test
+  - npm run build
+  - npm run test
 
 deploy:
   - provider: s3

gulpfile.js

@@ -22,7 +22,7 @@ var chalk = require('chalk'),
     pump = require('pump'),
     rename = require('gulp-rename'),
     runSequence = require('run-sequence'),
-    Server = require('karma').Server;
+    Server = require('karma').Server,
     stylish = require('jshint-stylish'),
     uglify = require('gulp-uglify'),
     gulpGlobs = require('./gulpGlobs');

package.json

@@ -4,7 +4,8 @@
   "description": "Gfycat js embed",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "build": "gulp build",
+    "test": "gulp test"
   },
   "repository": {
     "type": "git",