Update Nokogiri documentation (1.13.0)

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -589,7 +589,7 @@ credits = [
     'https://raw.githubusercontent.com/nodejs/node/master/LICENSE'
   ], [
     'Nokogiri',
-    '2008-2018 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo, Patrick Mahoney, Yoko Harada, Akinori MUSHA, John Shahid, Lars Kanis',
+    '2008–2021 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo, Patrick Mahoney, Yoko Harada, Akinori MUSHA, John Shahid, Lars Kanis',
     'MIT',
     'https://raw.githubusercontent.com/sparklemotion/nokogiri/master/LICENSE.md'
   ], [

lib/docs/filters/nokogiri2/attribution.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+module Docs
+  class Nokogiri2
+    class AttributionFilter < Docs::AttributionFilter
+      def attribution_link
+        url = current_url.to_s.sub! 'http://localhost', 'https://nokogiri.org/rdoc'
+        %(<a href="#{url}" class="_attribution-link">#{url}</a>)
+      end
+    end
+  end
+end

lib/docs/scrapers/nokogiri2.rb

@@ -7,15 +7,16 @@ module Docs
 
     self.name = 'Nokogiri'
     self.slug = 'nokogiri'
-    self.release = '1.10.4'
+    self.release = '1.13.0'
 
     html_filters.replace 'rdoc/entries', 'nokogiri2/entries'
+    text_filters.replace 'attribution', 'nokogiri2/attribution'
 
     options[:root_title] = 'Nokogiri'
     options[:only_patterns] = [/\ANokogiri/, /\AXSD/]
 
     options[:attribution] = <<-HTML
-      &copy; 2008&ndash;2018 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo,<br>
+      &copy; 2008&ndash;2021 Aaron Patterson, Mike Dalessio, Charles Nutter, Sergio Arbeo,<br>
       Patrick Mahoney, Yoko Harada, Akinori MUSHA, John Shahid, Lars Kanis<br>
       Licensed under the MIT License.
     HTML