Update PDFjs to 4.x

[philippebourcier]

PDFjs 4.x is out with some breaking changes, optimizations and bugfixes. 🚀

[MartinX3]

Luckily the 2.x version can also use native HTML5 instead of PDFjs.

But on the other side if you only need the HTML5 rendering you can just do

<object data="https://foo.com/bar.pdf" type="application/pdf" width="100%" height="500px">
	<p>Unable to display PDF file. <a href="https://foo.com/bar.pdf">Download</a> instead.</p>
</object>

and avoid this extension.