fix Rails version dependencies

Author: Francesco Rodriguez

test/fixtures/engine_project/engine_project.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_dependency "rails", "~> 4.0.0.beta1"
+  s.add_dependency "rails", ">= 4.0.0.beta", "< 5.0"
   # s.add_dependency "jquery-rails"
 
   s.add_development_dependency "sqlite3"

test/fixtures/sass_project/Gemfile

@@ -1,7 +1,7 @@
 source 'http://rubygems.org'
 
-gem 'rails', "~> 4.0.0.beta"
+gem 'rails', '>= 4.0.0.beta', '< 5.0'
 gem 'sqlite3'
 
 # Asset template engines
-gem 'sass-rails', :path => File.expand_path('../../../..', __FILE__)
+gem 'sass-rails', path: File.expand_path('../../../..', __FILE__)

test/fixtures/scss_project/Gemfile

@@ -1,7 +1,7 @@
 source 'http://rubygems.org'
 
-gem 'rails', "~> 4.0.0.beta"
+gem 'rails', '>= 4.0.0.beta', '< 5.0'
 gem 'sqlite3'
 
 # Asset template engines
-gem 'sass-rails', :path => File.expand_path('../../../..', __FILE__)
+gem 'sass-rails', path: File.expand_path('../../../..', __FILE__)