.travis.yml in gem_bench-1.0.4 vs .travis.yml in gem_bench-1.0.5

@@ -1,9 +1,9 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.0
-  - 2.1
-  - 2.2
-  - 2.3.3
-  - 2.4.0
-before_install: gem install bundler -v 1.14.5
+  - ruby-2.0.0-p648
+  - ruby-2.1.10
+  - ruby-2.2.10
+  - ruby-2.3.7
+  - ruby-2.4.4
+  - ruby-2.5.1