Gemfile in ykutils-0.1.3 vs Gemfile in ykutils-0.1.4

@@ -3,13 +3,21 @@
 source "https://rubygems.org"
 
 # Specify your gem's dependencies in ykutils.gemspec
 gemspec
 
-gem "rake", "~> 13.0"
+gem "tilt"
+gem "erubi"
 
-gem "rspec", "~> 3.0"
+group :development, optional: true do
+	gem "rake", "~> 13.0"
 
-gem "rubocop", "~> 1.21"
+	gem "yard"
+end
 
-gem "tilt"
-gem "erubi"
+group :test, optional: true do
+	gem "rspec", "~> 3.0"
+
+	gem "rubocop", "~> 1.21"
+	gem "rubocop-rake"
+	gem "rubocop-rspec"
+end