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: FVt0rYGSWqJW3i57y9CQHuDaa97UDwZuGc5ts+TDpbuR3DVP8LxB9MT1ApA2bqhg101hPzhWJWIK3Siotkb7eAlsiWgVhdNr8t5eZBPOOnjLiU6PNCF6ZGCZRJHQ6q4xQ2DycGug8OfwMw63yewLEYmVBppeAlStnPUfDWURlJ8=
-  - secure: X7cWxU13zLWoahM/BNBPSvgnI396zMmLzVHDHX6zAQL7gFL+PS4Dz6WjooO3Jx79ks2E8REUzWB8IFY3FohVAncXA///PAaqNLX0k2et4aOTOs5tcsCWL4nj8tKA6vjZIZ61rCjWTyNRR+o2QPsY9QQgi3Y+6bzLguWoPuycRbE=
-node_js: stable
+    - secure: >-
+        FVt0rYGSWqJW3i57y9CQHuDaa97UDwZuGc5ts+TDpbuR3DVP8LxB9MT1ApA2bqhg101hPzhWJWIK3Siotkb7eAlsiWgVhdNr8t5eZBPOOnjLiU6PNCF6ZGCZRJHQ6q4xQ2DycGug8OfwMw63yewLEYmVBppeAlStnPUfDWURlJ8=
+    - secure: >-
+        X7cWxU13zLWoahM/BNBPSvgnI396zMmLzVHDHX6zAQL7gFL+PS4Dz6WjooO3Jx79ks2E8REUzWB8IFY3FohVAncXA///PAaqNLX0k2et4aOTOs5tcsCWL4nj8tKA6vjZIZ61rCjWTyNRR+o2QPsY9QQgi3Y+6bzLguWoPuycRbE=
+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