.travis.yml in tspec-0.4.0 vs .travis.yml in tspec-0.5.0

@@ -1,7 +1,5 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.2
-  - 2.3.3
-  - 2.4.0
-before_install: gem install bundler -v 1.14.3
+  - 2.5.0
+before_install: gem install bundler -v 1.16.1