.travis.yml in macros4cuke-0.5.16 vs .travis.yml in macros4cuke-0.5.17

@@ -1,24 +1,29 @@
 language: ruby
+dist: trusty
+
+before_install:
+  - gem update --system
+  - gem install bundler  
+
+script:
+  - bundle exec rake
+  
 rvm:
-  - 2.6.0
-  - 2.5.3
-  - 2.4.5
+  - 2.6.3
+  - 2.5.5
+  - 2.4.6
   - 2.3.8
-  - 2.2.10
-  - 2.1.10
-  - 2.0.0-p648 
-  - ruby-head  
-  - jruby-9.1.9.0    
-  - jruby-head 
+  - ruby-head
+  - jruby-9.1.9.0
+  - jruby-head
+  
 matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
 
-gemfile:
-  - Gemfile
-  
+
 # whitelist
-branches:  
+branches:
   only:
     - master
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