Have travis test under more modern/supported MRIs

jrochkind · jrochkind · commit 05dc6a6826ba · 2019-08-21T12:36:42.000-04:00
Try to include a recent JRuby as well with travis default `jruby`.
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,9 @@
 language: ruby
 rvm:
-  - 1.8.7
-  - 1.9.3
   - 2.2.1
-  - jruby-18mode
-  - jruby-19mode
+  - 2.5.5
+  - 2.6.3
+  - jruby
+  #- jruby-18mode
+  #- jruby-19mode
 script: bundle exec rake test
