.travis.yml in departure-5.0.0 vs .travis.yml in departure-6.0.0

@@ -1,7 +1,7 @@
 language: ruby
 rvm:
-  - 2.1.2
+  - 2.2.8
 before_install:
   - sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 8507EFA5
   - echo "deb http://repo.percona.com/apt `lsb_release -cs` main" | sudo tee -a /etc/apt/sources.list
   - sudo apt-get update -qq
   - sudo apt-get install percona-toolkit