.travis.yml in gon-6.1.0 vs .travis.yml in gon-6.2.0

@@ -1,17 +1,8 @@
 language: ruby
 sudo: false
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1
-  - 2.2
-  - 2.3.0
+  - 2.3.3
+  - 2.4.0
   - ruby-head
-  - jruby-19mode # JRuby in 1.9 mode
-  - rbx
-matrix:
-  allow_failures:
-    - rvm: rbx
-    - rvm: ruby-head
 # uncomment this line if your project needs to run something other than `rake`:
 # script: bundle exec rspec spec