Update Grunt documentation

lib/docs/scrapers/grunt.rb

@@ -2,10 +2,14 @@ module Docs
   class Grunt < UrlScraper
     self.name = 'Grunt'
     self.type = 'simple'
-    self.release = '1.0.1'
+    self.release = '1.3.0'
     self.base_url = 'https://gruntjs.com/'
     self.root_path = 'getting-started'
     self.initial_paths = %w(api/grunt)
+    self.links = {
+      home: 'https://gruntjs.com/',
+      code: 'https://github.com/gruntjs/grunt'
+    }
 
     html_filters.push 'grunt/clean_html', 'grunt/entries'