restrict ruby testing to version 2.3.3 (#7)

* restrict ruby testing to version 2.3.3

Signed-off-by: Patrick Münch <[email protected]>

* update gemfile

Signed-off-by: Patrick Münch <[email protected]>

Author: atomic111

.travis.yml

@@ -2,9 +2,7 @@
 language: ruby
 cache: bundler
 rvm:
-  - 2.0
-  - 2.2
-  - 2.3.1
+  - 2.3.3
 
 bundler_args: --without integration
 script: bundle exec rake

Gemfile

@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'rake'
 gem 'rack', '1.6.4'
 gem 'inspec', '~> 1'
-gem 'rubocop', '~> 0.44.0'
+gem 'rubocop', '~> 0.46.0'
 gem 'highline', '~> 1.6.0'
 
 group :integration do