Upgrade pdfjs to expose PDF.js highlighting editor

[nopper]

The new version of pdfjs should support highlighting as additional annotations:

mozilla/pdf.js@1ea6293

It would be great to have this feature shipped in files_pdfviewer. So far the app only expose text, freehand drawing, and image annotations.

Steps to reproduce

1. Open a PDF in edit mode

Expected behaviour

Allowing the user to add highlighting annotations.

Actual behaviour

Only text, drawing and image insertion are the supported annotations.

Server configuration

Nextcloud version: (see Nextcloud admin page)
Nextcloud Hub 7 (28.0.0)

[hermeneuticlens]

I second this! Actually, enable all the annotation features pdf.js supports such text highlighting and text insertion.