Update Nokogiri to 1.14.0 (#38181).

git-svn-id: https://svn.redmine.org/redmine/trunk@22043 e93f8b46-1217-0410-a6f0-8f06a7374b81

Gemfile

@@ -10,7 +10,7 @@ gem "actionpack-xml_parser"
 gem 'roadie-rails', '~> 3.0.0'
 gem 'marcel'
 gem "mail", "~> 2.7.1"
-gem 'nokogiri', '~> 1.13.10'
+gem 'nokogiri', (Gem.ruby_version < Gem::Version.new('2.7') ? '~> 1.13.10' : '~> 1.14.0')
 gem 'i18n', '~> 1.12.0'
 gem "rbpdf", "~> 1.20.0"
 gem 'addressable'