purecss-sass.gemspec in purecss-sass-1.0.1.1 vs purecss-sass.gemspec in purecss-sass-2.0.0

@@ -1,30 +1,34 @@
-# coding: utf-8
-lib = File.expand_path('../lib', __FILE__)
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'purecss/sass/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'purecss-sass'
   spec.version       = Purecss::Sass::VERSION
   spec.authors       = ['Dmitriy Tarasov']
   spec.email         = ['[e-mail]']
 
-  spec.summary       = 'Pure CSS framework by Yahoo, converted to Sass and ready to use in Ruby projects'
-  spec.description   = 'Pure CSS framework by Yahoo, converted to Sass and ready to use in Ruby projects'
+  spec.summary       = 'Pure CSS framework, converted to Sass'
+  spec.description   = 'Pure CSS framework, converted to Sass'
   spec.homepage      = 'https://github.com/rubysamurai/purecss-sass'
   spec.license       = 'MIT'
 
-  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.metadata['bug_tracker_uri'] = 'https://github.com/rubysamurai/purecss-sass/issues'
+  spec.metadata['changelog_uri'] = 'https://github.com/rubysamurai/purecss-sass/blob/master/CHANGELOG.md'
+
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
+    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.0.0'
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.0.0')
 
   spec.add_runtime_dependency 'sassc', '>= 2.0'
 
   spec.add_development_dependency 'railties', '>= 5.0'
-  spec.add_development_dependency 'rspec', '>= 3.5'
+  spec.add_development_dependency 'rspec', '>= 3.9'
   spec.add_development_dependency 'sassc-rails', '>= 2.0'
   spec.add_development_dependency 'sprockets-rails', '>= 3.0'
 end