pio.gemspec in pio-0.30.1 vs pio.gemspec in pio-0.30.2

@@ -1,31 +1,33 @@
+# frozen_string_literal: true
+
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'pio/version'
 
 Gem::Specification.new do |gem|
   gem.name = 'pio'
   gem.version = Pio::VERSION
   gem.summary = 'Packet parser and generator.'
   gem.description = 'Pure ruby packet parser and generator.'
 
-  gem.licenses = %w(GPLv2 MIT)
+  gem.licenses = %w[GPLv2 MIT]
 
   gem.authors = ['Yasuhito Takamiya']
   gem.email = ['[e-mail]']
   gem.homepage = 'http://github.com/trema/pio'
 
-  gem.files = %w(CONTRIBUTING.md Rakefile pio.gemspec)
+  gem.files = %w[CONTRIBUTING.md Rakefile pio.gemspec]
   gem.files += Dir.glob('lib/**/*.rb')
   gem.files += Dir.glob('spec/**/*')
 
   gem.require_paths = ['lib']
 
-  gem.extra_rdoc_files = %w(README.md CHANGELOG.md CONTRIBUTING.md)
+  gem.extra_rdoc_files = %w[README.md CHANGELOG.md CONTRIBUTING.md]
   gem.test_files = Dir.glob('spec/**/*')
   gem.test_files += Dir.glob('features/**/*')
 
-  gem.required_ruby_version = '>= 2.2.2'
+  gem.required_ruby_version = '>= 2.3.0'
 
   gem.add_dependency 'bindata', '~> 2.1.0'
-  gem.add_dependency 'activesupport', '~> 5.0.2'
+  gem.add_dependency 'activesupport', '~> 5.1.0'
 end