Updates TravisCI config to use containers.

TravisCI builds are failing due to an [issue with bundler](rubygems/bundler#3558). One of the [suggested solutions](rubygems/bundler#3558 (comment)) was to use TravisCI's container-based infrastructure which has the added benefit of being faster. This commit updates `.travis.yml` to use the container-based infrastructure.
tmr08c · Jan 9, 2017 · ef4dba7 · ef4dba7
1 parent 6449b5d
commit ef4dba7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -9,3 +9,4 @@ matrix:
   allow_failures:
     - rvm: ruby-head
 bundler_args: --without local_development
+sudo: false