.travis.yml in unicode-confusable-1.1.0 vs .travis.yml in unicode-confusable-1.2.0

@@ -2,19 +2,15 @@
 language: ruby
 
 script: bundle exec ruby spec/unicode_confusable_spec.rb
 
 rvm:
-- 2.3.0
+- 2.4.1
+- 2.3.4
 - 2.2
 - ruby-head
-- rbx-2
 - jruby-head
-- jruby-9.0.5.0
+- jruby-9.1.12.0
 
-cache:
-- bundler
-
 matrix:
   allow_failures:
     - rvm: jruby-head
-    - rvm: rbx-2