Merge pull request #152 from lucas-aragno/master

Use omniauth 2.x to ensure latest security updates

Author: BobbyMcWho

omniauth-oauth2.gemspec

@@ -4,7 +4,7 @@ require "omniauth-oauth2/version"
 
 Gem::Specification.new do |gem|
   gem.add_dependency "oauth2",     [">= 1.4", "< 3"]
-  gem.add_dependency "omniauth",   [">= 1.9", "< 3"]
+  gem.add_dependency "omniauth",   "~> 2.0"
 
   gem.add_development_dependency "bundler", "~> 2.0"