language: ruby
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.4

language: ruby
sudo: false
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.4

Add `sudo: false` to Travis.yml
Add `sudo: false` to Travis.yml

Appears Travis CI updates to the environment shortly after the last set
of tests were run.

https://blog.travis-ci.com/2015-11-27-moving-to-a-more-elastic-future

The new environment is causing a number of errors and failures.

This is switching to their container based build env to see if that
changes things.
