Bump deps in the Gemfile

Author: tas50

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 group :lint do
   gem 'foodcritic', '~> 4.0'
-  gem 'rubocop', '~> 0.29.0'
+  gem 'rubocop', '~> 0.31'
   gem 'rainbow', '< 2.0'
   gem 'rake'
 end
@@ -13,11 +13,11 @@ group :unit do
 end
 
 group :kitchen_common do
-  gem 'test-kitchen', '~> 1.3.1'
+  gem 'test-kitchen', '~> 1.4'
 end
 
 group :kitchen_vagrant do
-  gem 'kitchen-vagrant', '~> 0.15'
+  gem 'kitchen-vagrant', '~> 0.18'
 end
 
 group :kitchen_cloud do