Update .travis.yml (#8648)

Author: ecadius

.travis.yml

@@ -6,16 +6,17 @@ php:
 sudo: required
 
 dist: trusty
-
 cache:
   directories:
   - node_modules
 
 before_script:
   - npm install -g grunt-cli
   - npm install
+  - npm install -g casperjs
+  - npm i -g npm
 
-script: npm run-script ci
+script: travis_wait npm run-script ci
 
 env:
   - JQUERIES=1.10.2