Gemfile in solidus_gateway-1.2.0 vs Gemfile in solidus_gateway-1.3.0

@@ -5,13 +5,25 @@
 
 if branch == 'master' || branch >= "v2.0"
   gem "rails-controller-testing", group: :test
 end
 
-gem 'pg'
-gem 'mysql2'
+# hacks to speed up bundler resolution
+if branch == 'master' || branch >= "v2.3"
+  gem 'rails', '~> 5.1.6'
+elsif branch >= "v2.0"
+  gem 'rails', '~> 5.0.7'
+else
+  gem "rails", "~> 4.2.10"
+end
 
+gem 'pg', '~> 0.21'
+gem 'mysql2', '~> 0.4.10'
+
+gem 'chromedriver-helper' if ENV['CI']
+
 group :development, :test do
   gem "pry-rails"
+  gem "ffaker"
 end
 
 gemspec