pdd.gemspec in pdd-0.17.9 vs pdd.gemspec in pdd-0.18

@@ -1,7 +1,5 @@
-# encoding: utf-8
-#
 # Copyright (c) 2014-2017 Yegor Bugayenko
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the 'Software'), to deal
 # in the Software without restriction, including without limitation the rights
@@ -18,10 +16,12 @@
 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+require 'English'
+
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require_relative 'lib/pdd/version'
 
 Gem::Specification.new do |s|
@@ -33,25 +33,27 @@
   s.required_ruby_version = '>= 1.9.3'
   s.name = 'pdd'
   s.version = PDD::VERSION
   s.license = 'MIT'
   s.summary = 'Puzzle Driven Development collector'
-  s.description = 'Collects PDD puzzles from source code base'
+  s.description = 'Collects PDD puzzles from a source code base'
   s.authors = ['Yegor Bugayenko']
   s.email = '[e-mail]'
   s.homepage = 'http://github.com/yegor256/pdd'
   s.files = `git ls-files`.split($RS)
   s.executables = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
   s.test_files = s.files.grep(%r{^(test|spec|features)/})
   s.rdoc_options = ['--charset=UTF-8']
   s.extra_rdoc_files = ['README.md', 'LICENSE.txt']
-  s.add_runtime_dependency 'nokogiri', '~>1.7.2'
-  s.add_runtime_dependency 'slop', '~>4.4.1'
+  s.add_runtime_dependency 'nokogiri', '~>1.7'
+  s.add_runtime_dependency 'slop', '~>4.4'
+  s.add_runtime_dependency 'rainbow', '~>2.2'
   s.add_development_dependency 'rake', '12.0.0'
   s.add_development_dependency 'codecov', '0.1.10'
   s.add_development_dependency 'rdoc', '4.2.0'
   s.add_development_dependency 'cucumber', '1.3.17'
   s.add_development_dependency 'minitest', '5.5.0'
-  s.add_development_dependency 'rubocop', '0.41.2'
-  s.add_development_dependency 'rubocop-rspec', '1.5.1'
+  s.add_development_dependency 'rubocop', '0.48.1'
+  s.add_development_dependency 'rubocop-rspec', '1.15.1'
   s.add_development_dependency 'rspec-rails', '3.1.0'
+  s.add_development_dependency 'xcop', '~>0.5'
 end