Gemfile in rake-funnel-0.18.0 vs Gemfile in rake-funnel-0.19.0

@@ -1,33 +1,41 @@
-require 'rbconfig'
-
 source 'https://rubygems.org'
 
 gemspec
 
-group :development do
+group :coverage do
+  gem 'codeclimate-test-reporter'
+  gem 'coveralls'
+  gem 'simplecov-teamcity-summary'
+end
+
+group :style do
+  gem 'rubocop', '~> 0.46'
+  gem 'rubocop-rspec'
+end
+
+group :test do
+  gem 'rspec', '~> 3.0'
+  gem 'rspec-collection_matchers'
+  gem 'rspec-its'
+end
+
+group :development, :guard do
   gem 'guard-bundler'
   gem 'guard-rspec'
   gem 'guard-rubocop'
 
-  case RbConfig::CONFIG['target_os']
-  when /windows|bccwin|cygwin|djgpp|mingw|mswin|wince/i
+  # guard notifications.
+  install_if(-> { Gem.win_platform? }) do
     gem 'ruby_gntp'
     gem 'wdm'
-  when /linux/i
+  end
+
+  install_if(-> { RbConfig::CONFIG['target_os'] =~ /linux/i }) do
     gem 'rb-inotify'
-  when /mac|darwin/i
-    gem 'rb-fsevent'
-    gem 'growl'
   end
-end
 
-group :development, :ci do
-  gem 'rspec', '~> 3.0'
-  gem 'rspec-its'
-  gem 'rspec-collection_matchers'
-  gem 'coveralls'
-  gem 'codeclimate-test-reporter'
-  gem 'rubocop', '~> 0.37.2'
-  gem 'rubocop-rspec'
-  gem 'simplecov-teamcity-summary'
+  install_if(-> { RbConfig::CONFIG['target_os'] =~ /mac|darwin/i }) do
+    gem 'rb-fsevent'
+    gem 'terminal-notifier-guard'
+  end
 end