Bug 1811633 - use updated, vendored version of PKI.js, remove old version r=Gijs
This also converts certDecoder.jsm to an ES module (as certDecoder.mjs) and
updates all uses of it.
Differential Revision:
https://phabricator.services.mozilla.com/D167466
<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Cross iframe selection drag and drop from textarea to text input</title>
<style type="text/css">
iframe
{width:100%;
height:200px;
border-style:none;}
</style>
</head>
<body>
<p><iframe src="helper-drag-me-textarea-to-other-input.xhtml">XHTML document</iframe></p>
<p><iframe src="helper-drop-here-input.xhtml">XHTML document</iframe></p>
</body>
</html>
