.travis.yml in backticks-0.3.1 vs .travis.yml in backticks-0.4.0

@@ -1,4 +1,7 @@
+sudo: false
 language: ruby
 rvm:
-  - 2.2.2
-before_install: gem install bundler -v 1.10.6
+- 1.9
+- 2.2
+before_install: gem install bundler -v '~> 1.10'
+script: bundle exec rake spec