Bump web push testing service version (#100)

Author: Matt Gaunt

.travis.yml

@@ -20,7 +20,7 @@ before_install:
   - nvm install node
 
 install:
-  - npm install [email protected].1 -g
+  - npm install [email protected].2 -g
 
 before_script:
   - composer install --prefer-source -n