update gemfile and test matrix

.travis.yml

@@ -8,14 +8,7 @@ dist: trusty
 services:
   - docker
 
-rvm:
-  - 2.2
-  - 2.1
-  - 2.0.0
-  - 1.9.3
-  - ruby-head
-
-bundler_args: --without guard integration
+bundler_args: --without integration guard tools
 
 before_install:
   - gem update --system 2.4.5
@@ -33,5 +26,9 @@ matrix:
       gemfile: Gemfile
     - rvm: ruby-head
       gemfile: Gemfile
+    - rvm: 2.2
+      gemfile: Gemfile
+      bundler_args: --without guard tools
+      script: bundle exec rake test:integration
   allow_failures:
     - rvm: ruby-head

Gemfile

@@ -8,16 +8,21 @@ group :guard do
 end
 
 group :test do
+  gem 'bundler', '~> 1.5'
+  gem 'minitest', '~> 5.5'
+  gem 'rake', '~> 10'
+  gem 'rubocop', '~> 0.32'
+  gem 'concurrent-ruby', '~> 0.9'
   gem 'codeclimate-test-reporter', :require => nil
-end
-
-group :tools do
-  gem 'github_changelog_generator', '~> 1'
+  gem 'test-kitchen', '~> 1.4', :require => nil
 end
 
 group :integration do
-  gem 'berkshelf', '~> 4.0'
-  gem 'test-kitchen', '~> 1.4', :require => nil
+  gem 'berkshelf'
   gem 'kitchen-dokken'
-  gem 'kitchen-inspec', path: '.'
+end
+
+group :tools do
+  gem 'pry', '~> 0.10'
+  gem 'github_changelog_generator', '~> 1'
 end