head_music.gemspec in head_music-0.17.0 vs head_music.gemspec in head_music-0.18.0

@@ -1,33 +1,35 @@
-# coding: utf-8
+
+# frozen_string_literal: true
+
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'head_music/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = "head_music"
+  spec.name          = 'head_music'
   spec.version       = HeadMusic::VERSION
-  spec.authors       = ["Rob Head"]
-  spec.email         = ["[e-mail]"]
+  spec.authors       = ['Rob Head']
+  spec.email         = ['[e-mail]']
 
-  spec.summary       = %q{The rudiments of western music theory.}
-  spec.description   = %q{Work with the elements of western music theory, such as pitches, scales, intervals, and chords.}
-  spec.homepage      = "https://github.com/roberthead/head_music"
-  spec.license       = "MIT"
+  spec.summary       = 'The rudiments of western music theory.'
+  spec.description   = 'Work with the elements of western music theory, such as pitches, scales, intervals, and chords.'
+  spec.homepage      = 'https://github.com/roberthead/head_music'
+  spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end
-  spec.bindir        = "exe"
+  spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
-  spec.require_paths = ["lib"]
+  spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '> 2.3.0'
+  spec.required_ruby_version = '>= 2.4.0'
 
-  spec.add_runtime_dependency "activesupport", "~> 5.0"
-  spec.add_runtime_dependency "humanize", "~> 1.3"
+  spec.add_runtime_dependency 'activesupport', '~> 5.0'
+  spec.add_runtime_dependency 'humanize', '~> 1.3'
 
-  spec.add_development_dependency "bundler", "~> 1.13"
-  spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "rspec", "~> 3.0"
-  spec.add_development_dependency "rspec-its", "~> 1.2"
+  spec.add_development_dependency 'bundler', '~> 1.13'
+  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'rspec-its', '~> 1.2'
 end