Update CoffeeScript documentation

assets/javascripts/templates/pages/about_tmpl.coffee

@@ -188,7 +188,7 @@ credits = [
     'https://raw.githubusercontent.com/bcit-ci/CodeIgniter/develop/license.txt'
   ], [
     'CoffeeScript',
-    '2009-2018 Jeremy Ashkenas',
+    '2009-2020 Jeremy Ashkenas',
     'MIT',
     'https://raw.githubusercontent.com/jashkenas/coffeescript/master/LICENSE'
   ], [

lib/docs/scrapers/coffeescript.rb

@@ -11,12 +11,12 @@ module Docs
     options[:skip_links] = true
 
     options[:attribution] = <<-HTML
-      &copy; 2009&ndash;2018 Jeremy Ashkenas<br>
+      &copy; 2009&ndash;2020 Jeremy Ashkenas<br>
       Licensed under the MIT License.
     HTML
 
     version '2' do
-      self.release = '2.4.1'
+      self.release = '2.5.1'
       self.base_url = 'https://coffeescript.org/'
 
       html_filters.push 'coffeescript/entries', 'coffeescript/clean_html', 'title'