.travis.yml in fluent-plugin-sflow-0.1.0 vs .travis.yml in fluent-plugin-sflow-0.2.0

@@ -1,5 +1,19 @@
-sudo: false
 language: ruby
-rvm:
-  - 2.2.2
-before_install: gem install bundler -v 1.14.6
+dist: trusty
+sudo: required
+
+matrix:
+  include:
+  - os: linux
+    rvm: 2.1
+  - os: linux
+    rvm: 2.2
+  - os: linux
+    rvm: 2.3
+  - os: linux
+    rvm: 2.4.0
+  - os: linux
+    rvm: ruby-head
+  allow_failures:
+  - rvm: ruby-head
+  fast_finish: true