.travis.yml in hydra-role-management-0.2.2 vs .travis.yml in hydra-role-management-1.0.0

@@ -1,18 +1,11 @@
 language: ruby
+sudo: false
+cache:
+  bundler: true
 rvm:
-  - 2.0
-  - 2.1
+  - 2.4.2
 env:
   global:
-  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
-notifications:
-  email:
-    recipients:
-      - "[e-mail]"
-    on_success: "change"
-    on_failure: "always"
-  irc:
-    channels:
-      - "irc.freenode.org#projecthydra"
-    template:
-      - "%{repository}//%{branch}@%{commit} by %{author}: %{message} - %{build_url}"
+    - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
+  matrix:
+    - RAILS_VERSION=5.1.4