test: use TravisCI's container based infrastructure

rmehner · rmehner · commit 5a7304867988 · 2015-12-14T16:04:58.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,4 @@
+sudo: false
 language: ruby
 rvm:
   - 1.9.2
