update bower version and dependencies

bower_components/bootstrap/grunt/bs-lessdoc-parser.js

@@ -6,10 +6,10 @@
  */
 'use strict';
 
-var Remarkable = require('remarkable');
+var Markdown = require('markdown-it');
 
 function markdown2html(markdownString) {
-  var md = new Remarkable();
+  var md = new Markdown();
 
   // the slice removes the <p>...</p> wrapper output by Markdown processor
   return md.render(markdownString.trim()).slice(3, -5);