Update dependencies to enable Greenkeeper 🌴

.travis.yml

@@ -1,11 +1,20 @@
 sudo: false
+
 language: node_js
 
-notifications:
-  email:
-    on_success: never
-    on_failure: change
+env:
+  - MOZ_HEADLESS=1
+
+script: npm run lint && npm run test-server-open && npm run test-node && npm run test-browser
+after_script: npm run test-server-close
 
 node_js:
   - "4"
-  - "stable"
+  - "6"
+  - "8"
+  - "lts/*"
+
+cache:
+  directories:
+    - node_modules
+    - $HOME/.npm

README.md

@@ -1,5 +1,7 @@
 # Client OAuth 2.0
 
+[![Greenkeeper badge](https://badges.greenkeeper.io/mulesoft/js-client-oauth2.svg)](https://greenkeeper.io/)
+
 [![NPM version][npm-image]][npm-url]
 [![NPM downloads][downloads-image]][downloads-url]
 [![Build status][travis-image]][travis-url]

karma.conf.js

@@ -113,7 +113,7 @@ module.exports = function (config) {
      *
      * @type {Array}
      */
-    browsers: isTravis ? ['PhantomJS'] : ['Chrome', 'Firefox', 'PhantomJS'],
+    browsers: isTravis ? ['PhantomJS', 'Firefox'] : ['Chrome', 'Firefox', 'PhantomJS'],
 
     /**
      * If a browser does not capture within a given timeout, kill it.