Build assets in Travis

Author: mpiot

.travis.yml

@@ -5,6 +5,7 @@ cache:
   directories:
     - $HOME/.composer/cache/files
     - ./bin/.phpunit
+    - node_modules
 
 env:
   global:
@@ -27,6 +28,8 @@ before_install:
 install:
   - composer install
   - ./bin/phpunit install
+  - yarn install
+  - yarn build
 
 script:
   - ./bin/phpunit