Gemfile and gemspec files cleanup

Gemfile

@@ -7,20 +7,20 @@ source 'https://rubygems.org'
 # Specify your gem's dependencies in elasticsearch-dsl.gemspec
 gemspec
 
-if File.exist? File.expand_path("../../elasticsearch/elasticsearch.gemspec", __FILE__)
-  gem 'elasticsearch', :path => File.expand_path("../../elasticsearch", __FILE__), :require => false
+if File.exist? File.expand_path('../../elasticsearch/elasticsearch.gemspec', __FILE__)
+  gem 'elasticsearch', path: File.expand_path('../../elasticsearch', __FILE__), require: false
 end
 
-if File.exist? File.expand_path("../../elasticsearch-transport", __FILE__)
-  gem 'elasticsearch-transport', :path => File.expand_path("../../elasticsearch-transport", __FILE__), :require => true
+if File.exist? File.expand_path('../../elasticsearch-transport', __FILE__)
+  gem 'elasticsearch-transport', path: File.expand_path('../../elasticsearch-transport', __FILE__), require: true
 end
 
-if File.exist? File.expand_path("../../elasticsearch-api", __FILE__)
-  gem 'elasticsearch-api', :path => File.expand_path("../../elasticsearch-api", __FILE__), :require => false
+if File.exist? File.expand_path('../../elasticsearch-api', __FILE__)
+  gem 'elasticsearch-api', path: File.expand_path('../../elasticsearch-api', __FILE__), require: false
 end
 
-if File.exist? File.expand_path("../../elasticsearch-extensions", __FILE__)
-  gem 'elasticsearch-extensions', :path => File.expand_path("../../elasticsearch-extensions", __FILE__), :require => false
+if File.exist? File.expand_path('../../elasticsearch-extensions', __FILE__)
+  gem 'elasticsearch-extensions', path: File.expand_path('../../elasticsearch-extensions', __FILE__), require: false
 end
 
 group :development do

elasticsearch-dsl.gemspec

@@ -8,41 +8,38 @@ $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'elasticsearch/dsl/version'
 
 Gem::Specification.new do |s|
-  s.name          = "elasticsearch-dsl"
+  s.name          = 'elasticsearch-dsl'
   s.version       = Elasticsearch::DSL::VERSION
-  s.authors       = ["Karel Minarik"]
-  s.email         = ["karel.minarik@elasticsearch.com"]
+  s.authors       = ['Karel Minarik']
+  s.email         = ['karel.minarik@elasticsearch.com']
   s.description   = %q{A Ruby DSL builder for Elasticsearch}
   s.summary       = s.description
-  s.homepage      = "https://github.com/elasticsearch/elasticsearch-ruby/tree/master/elasticsearch-dsl"
-  s.license       = "Apache-2.0"
+  s.homepage      = 'https://github.com/elasticsearch/elasticsearch-ruby/tree/master/elasticsearch-dsl'
+  s.license       = 'Apache-2.0'
 
   s.files         = `git ls-files`.split($/)
   s.executables   = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
   s.test_files    = s.files.grep(%r{^(test|spec|features)/})
-  s.require_paths = ["lib"]
+  s.require_paths = ['lib']
 
-  s.extra_rdoc_files  = [ "README.md", "LICENSE.txt" ]
-  s.rdoc_options      = [ "--charset=UTF-8" ]
+  s.extra_rdoc_files  = [ 'README.md', 'LICENSE.txt' ]
+  s.rdoc_options      = [ '--charset=UTF-8' ]
 
-  s.required_ruby_version = '>= 1.9'
+  s.required_ruby_version = '>= 2.5'
 
-  s.add_development_dependency "bundler"
-  s.add_development_dependency "rake", "~> 11.1"
+  s.add_development_dependency 'bundler'
+  s.add_development_dependency 'rake', '~> 11.1'
 
-  s.add_development_dependency "elasticsearch"
-  s.add_development_dependency "elasticsearch-extensions"
+  s.add_development_dependency 'elasticsearch'
+  s.add_development_dependency 'elasticsearch-extensions'
 
-  s.add_development_dependency 'shoulda-context'
-  s.add_development_dependency 'mocha'
+  s.add_development_dependency 'cane'
   s.add_development_dependency 'minitest', '~> 5'
   s.add_development_dependency 'minitest-reporters', '~> 1'
+  s.add_development_dependency 'mocha'
+  s.add_development_dependency 'pry'
+  s.add_development_dependency 'shoulda-context'
   s.add_development_dependency 'simplecov'
+  s.add_development_dependency 'test-unit', '~> 2'
   s.add_development_dependency 'yard'
-  s.add_development_dependency 'cane'
-  s.add_development_dependency 'pry'
-
-  if defined?(RUBY_VERSION) && RUBY_VERSION > '2.2'
-    s.add_development_dependency "test-unit", '~> 2'
-  end
 end