Fix master tests, use latest arel

Author: arthurnn

Gemfile

@@ -4,3 +4,4 @@ source "https://rubygems.org"
 gemspec
 
 gem "rails", github: "rails/rails"
+gem "arel", github: "rails/arel"

test/test_helper.rb

@@ -11,11 +11,11 @@
 # If developing against local dependencies, this code will ensure they get picked up
 # in the project fixtures that have their own bundle environment
 $gem_options = {}
-possible_dev_dependencies = %w(sass-rails sass rails actionpack railties sprockets journey sprockets-rails activerecord-deprecated_finders)
+possible_dev_dependencies = %w(sass-rails sass rails arel actionpack railties sprockets journey sprockets-rails activerecord-deprecated_finders)
 Bundler.load.specs.each do |s|
   if possible_dev_dependencies.include?(s.name)
      gem_path = s.full_gem_path
-     gem_options = { version: s.version}
+     gem_options = { version: s.version }
      gem_options[:path] = gem_path if File.exists?("#{gem_path}/#{s.name}.gemspec")
      $gem_options[s.name] = gem_options
   end