Allow recent versions of omniauth

Author: zquestz

omniauth-contrib.gemspec

@@ -2,7 +2,7 @@
 require File.expand_path(File.join('..', 'lib', 'omniauth', 'google_oauth2', 'version'), __FILE__)
 
 Gem::Specification.new do |gem|
-  gem.add_dependency 'omniauth', '~> 1.0'
+  gem.add_dependency 'omniauth', '> 1.0'
 
   gem.authors       = ["Josh Ellithorpe", "Yury Korolev"]
   gem.email         = ["quest@mac.com"]