Update travis config

.travis.yml

@@ -1,23 +1,24 @@
 language: node_js
 sudo: required
 before_script:
-- npm install -g bower polylint web-component-tester
-- bower install
-- polylint
+  - npm install -g bower polylint web-component-tester
+  - bower install
+  - polylint
 env:
   global:
-  - secure: H49pcRc5C6G+ti/ehtT74GZdsUsM/xCvEVJBmKq8rpck7s18R6BbH37RkF2XgYfO4rVa1Bl4KU4Wf5S6aIDYzdaq/phGtFQ04NmDYGbmBhRjwfgxlW4dJ7mkXqXCvNZkxJtAJpgzgVG+xu/I6GsO1Lp4VjGENvVYSsrkGIlSA34=
-  - secure: Zq+hvOlL1RmTtMfAtO3bxqYnB7X6MY199cVCKo2J/EbsMvOHII1JvEU1+s2/UG9tgoiXkd7N2OfFOivlbQ75BDIwtvkq32KZNrUEC6vRGhbMBc8JCKkdFB/XHh1mNhQcn6Js656PhZIj2WteZYMSGYDUj7KcBBMacRZQKWuB0OU=
-node_js: stable
+    - secure: >-
+        H49pcRc5C6G+ti/ehtT74GZdsUsM/xCvEVJBmKq8rpck7s18R6BbH37RkF2XgYfO4rVa1Bl4KU4Wf5S6aIDYzdaq/phGtFQ04NmDYGbmBhRjwfgxlW4dJ7mkXqXCvNZkxJtAJpgzgVG+xu/I6GsO1Lp4VjGENvVYSsrkGIlSA34=
+    - secure: >-
+        Zq+hvOlL1RmTtMfAtO3bxqYnB7X6MY199cVCKo2J/EbsMvOHII1JvEU1+s2/UG9tgoiXkd7N2OfFOivlbQ75BDIwtvkq32KZNrUEC6vRGhbMBc8JCKkdFB/XHh1mNhQcn6Js656PhZIj2WteZYMSGYDUj7KcBBMacRZQKWuB0OU=
+node_js: '6'
 addons:
-  firefox: '46.0'
+  firefox: latest
   apt:
     sources:
-    - google-chrome
+      - google-chrome
     packages:
-    - google-chrome-stable
-  sauce_connect: true
+      - google-chrome-stable
 script:
-- xvfb-run wct
-- if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then wct -s 'default'; fi
+  - xvfb-run wct
+  - 'if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then wct -s ''default''; fi'
 dist: trusty