[CI] Test against Ruby versions

nicolasleger · web-flow · commit 50163b246c8b · 2018-02-16T11:14:19.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,12 @@
 language: ruby
+rvm:
+  - 1.9.3
+  - 2.0.0
+  - 2.1
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
 before_install:
   - gem update
   - gem install bundler
