Move development deps into Gemfile groups

Signed-off-by: Tim Smith <[email protected]>

Gemfile

@@ -1,6 +1,18 @@
 source "https://rubygems.org"
 
-# Specify dependencies in gemspec:
+# Specify your gem's dependencies in kitchen-google.gemspec
 gemspec
 
-gem "chefstyle"
+group :test do
+  gem "rake", ">= 11.0"
+  gem "rspec", "~> 3.2"
+end
+
+group :debug do
+  gem "pry"
+  gem "byebug"
+end
+
+group :chefstyle do
+  gem "chefstyle", "=1.5.9"
+end

kitchen-google.gemspec

@@ -16,13 +16,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency "gcewinpass",        "~> 1.1"
   s.add_dependency "google-api-client", ">= 0.23.9", "<= 0.52.0"
-  s.add_dependency "test-kitchen"
-
-  s.add_development_dependency "bundler"
-  s.add_development_dependency "pry"
-  s.add_development_dependency "rake"
-  s.add_development_dependency "rspec"
-  s.add_development_dependency "byebug"
+  s.add_dependency "test-kitchen",      ">= 1.4.1"
 
   s.required_ruby_version = ">= 2.5"
 end