Update travis config

.travis.yml

@@ -1,23 +1,23 @@
 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: ltCkwJM0nkTS9WjikyjqBsB5J2hQon4UnVVrINk4y+Vq4v9PQJH3+83nya0jnxilKaeAJs4d2/OS02F9GkqYpsSmDz7OgXPfk0hrHA8UksvvpSALfnukleIAN2YTOcxXJKeNHcfpqCKPk1dGeNQOEM61H+QgTBIyFB3sMugygqs=
-    - secure: TJuu1WdpFLTaBN/prBafm8Pld/BQCySNuuG1nATbF3fqiOpgehXu8Z5URAz5syUhqZAyEmuRMxvXpEVD/t1jrtaXVwkdCFkkQ4ckkP4gTIeSGA/Puw8sveB2q7QAqXyTmeFkocNlh8fxV+B07o0SPWdhcvdZnDVU9VrpSqL+92M=
+  - secure: SFfLw5U6C/7UFRyt/ho5AXNnf8E1d7bY6V9lPT2UnHjkNl4NldWyJEkBeaFTERChKmrYBNk33g748OGohL8snCRXCPxM9A/OKRWEGSFIvPmgLs8mkpbNodUAcpL6dbDLlZgcVDHXCn1uvVQgOgzg64FWW5ozphxD4u/nl5nA7aY=
+  - secure: a6YFcuIvE3PJ9C0F7cimJ/R8EGlKy2rlg7Re2ezpL85f4++cYnYBUrNnbwj+BNp5F9IXZxvD6T+kNr+1BJtqILFf54W5baBgB5PVCSt7dry+lrcRUf5yTIRl0yJ+73UJrEWR2UOXaXlGzbQ56k2TWAbnzVbq2jik1vdgSnxbjLE=
 node_js: stable
 addons:
   firefox: '46.0'
   apt:
     sources:
-      - google-chrome
+    - google-chrome
     packages:
-      - google-chrome-stable
+    - google-chrome-stable
   sauce_connect: true
 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