Merge pull request #1133 from mark-young-atg/provide_changelog_link_on_rubygems

Provide a 'Changelog' link on rubygems.org/gems/acts-as-taggable-on

Author: seuros

acts-as-taggable-on.gemspec

@@ -29,4 +29,6 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency 'rspec'
   gem.add_development_dependency 'barrier'
   gem.add_development_dependency 'database_cleaner'
+
+  gem.metadata['changelog_uri'] = gem.homepage + '/blob/master/CHANGELOG.md'
 end