ci(travis): update travis config for canary

Author: Awk34

Diff for: templates/app/.travis.yml

@@ -1,12 +1,6 @@
 language: node_js
 node_js:
-  - 4.4.6
-matrix:
-  fast_finish: true
-  allow_failures:
-    - node_js: 5.12.0
+  - 6
 before_script:
-  - npm install -g gulp-cli<% if (filters.sass) { %>
-  - gem install sass<% } %>
-  - bower install
+  - npm install -g gulp-cli
 services: mongodb