.travis.yml in lazy_high_charts-1.5.5 vs .travis.yml in lazy_high_charts-1.5.6

@@ -3,7 +3,6 @@
 bundler_args: --without production development
 
 script: bundle exec rake
 
 rvm:
-  - 1.9.3
-  - 2.0.0
+  - 2.2.5