Ruby 2.x Syslog::Logger is newer than the one in Rubygems but version is the same
Users of Ruby 2.x get the latest version of syslog/logger.rb as included from https://bugs.ruby-lang.org/issues/5096; however, the version of the gem is not updated to reflect that this new one has more features (for example, you can pass facility information and such).
 pry(main)> require 'syslog/logger'
 pry(main)> Syslog::Logger::VERSION
 pry(main)> RUBY_VERSION