.travis.yml in knife-ec2-0.18.2 vs .travis.yml in knife-ec2-0.19.10

@@ -1,27 +1,20 @@
+sudo: false
 language: ruby
 cache: bundler
-dist: trusty
-sudo: false
 
-# Early warning system to catch if Rubygems breaks something
-before_install:
-  - gem update --system
-  - gem uninstall bundler -a -x
-  - gem install bundler
-  - rm -f .bundle/config
-
-rvm:
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
-  - ruby-head
-  
 matrix:
+  include:
+    - rvm: 2.3.7
+    - rvm: 2.4.4
+    - rvm: 2.5.1
+    - rvm: ruby-head
   allow_failures:
     - rvm: ruby-head
 
-script: bundle exec rake spec
-
 branches:
   only:
   - master
+
+bundler_args: --without docs development
+
+script: bundle exec rake