magro.gemspec in magro-0.2.0 vs magro.gemspec in magro-0.3.0

@@ -12,9 +12,14 @@
   spec.description   = 'Magro is an image processing library for Ruby.'
 
   spec.homepage      = 'https://github.com/yoshoku/magro'
   spec.license       = 'BSD-3-Clause'
 
+  spec.metadata['homepage_uri'] = spec.homepage
+  spec.metadata['source_code_uri'] = 'https://github.com/yoshoku/magro'
+  spec.metadata['changelog_uri'] = 'https://github.com/yoshoku/magro/blob/master/CHANGELOG.md'
+  spec.metadata['documentation_uri'] = 'https://yoshoku.github.io/magro/doc/'
+
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
   spec.files         = Dir.chdir(File.expand_path(__dir__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   end