Prototype CVE - update prototype.js (#429)

* Update 20_prototype.js for CVE-2020-27511

Prototype isn't maintained, but the CVE can be resolved.
Taken from:
prototypejs/prototype#349

* Update 20_prototype.js

Change Version string

* Make mis-matched single-quotes greedier

Author: jesusbagpuss

ingredients/prototypejs/static/javascript/auto/20_prototype.js

@@ -8,7 +8,7 @@
 
 var Prototype = {
 
-  Version: '1.7.3',
+  Version: '1.7.3.1-eprints',
 
   Browser: (function(){
     var ua = navigator.userAgent;
@@ -621,7 +621,7 @@ Object.extend(String.prototype, (function() {
   }
 
   function stripTags() {
-    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?(\/)?>|<\/\w+>/gi, '');
+    return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>'"])+)?\s*("[^">]*|'[^'>]*)?(\/)?>|<\/\w+>/gi, '');
   }
 
   function stripScripts() {