Move dev dependencies into the Gemfile

Author: waiting-for-dev

Gemfile

@@ -13,6 +13,9 @@ gem 'solidus', github: 'solidusio/solidus', branch: branch
 # A workaround for https://github.com/bundler/bundler/issues/6677
 gem 'rails', '>0.a'
 
+gem 'bundler'
+gem 'rake'
+
 # These gems will be used by the temporary extensions generated by tests
 group :test do
   gem 'mysql2'

solidus_dev_support.gemspec

@@ -47,7 +47,4 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'rubocop-rspec', '~> 2.0'
   spec.add_dependency 'solidus_core', ['>= 2.0', '< 4']
   spec.add_dependency 'webdrivers', '>= 4.4'
-
-  spec.add_development_dependency 'bundler'
-  spec.add_development_dependency 'rake'
 end