Minor tweak to Rakefile to make it more consistent with coding conven…

…tions

Rakefile

@@ -4,12 +4,12 @@ require 'jeweler'
 require 'rspec/core/rake_task'
 
 Jeweler::Tasks.new do |gem|
-  gem.name        = "virtus"
+  gem.name        = 'virtus'
   gem.platform    = Gem::Platform::RUBY
-  gem.authors     = ["Piotr Solnica"]
-  gem.email       = ["piotr@rubyverse.com"]
-  gem.homepage    = "https://github.com/solnic/virtus"
-  gem.summary     = %q{Attributes for your plain ruby objects}
+  gem.authors     = [ 'Piotr Solnica' ]
+  gem.email       = [ 'piotr@rubyverse.com' ]
+  gem.homepage    = 'https://github.com/solnic/virtus'
+  gem.summary     = 'Attributes for your plain ruby objects'
   gem.description = gem.summary
 end