cache node modules in order to speed up builds

ichiriac · ichiriac · commit b7f1483e4c2c · 2016-12-28T19:11:05.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,10 @@
 language: node_js
 node_js:
   - '0.12'
+cache:
+  bundler: true
+  directories:
+  - node_modules # NPM package
 notifications:
   email: false
   webhooks:
