Bug 1962416: Upgrade PDF.js from v2.9.359 to v2.13.216

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Website: http://mozilla.github.io/pdf.js/getting_started/#download

Version: 2.9.359

Version: 2.13.216

License: Apache License 2.0

PDF.js is used in the Mahara to provide a javascript library for

4. Copy and rename it to pdf.min.js

5. Copy the new files in `build/minified/` to go in our version on the pdfjs/ directory

**Checks** and file renames

**Checks**:

1. Make sure you can open and see a PDF via browser

Make sure you can open and see a PDF via browser

    {WWWROOT}/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.html

2. Update the template file htdocs/theme/raw/plugintype/artefact/file/blocktype/pdf/templates/pdf.tpl

    based on htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.html

    and htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.js

3. Change the path of pdf.js to pdf.min.js

    In htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.html

4. Change the path of pdf.worker.js to pdf.worker.min.js

    In htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.js

**Changes**:

- Update our template file htdocs/theme/raw/plugintype/artefact/file/blocktype/pdf/templates/pdf.tpl

based on the updated htdocs/artefact/file/blocktype/pdf/js/pdfjs/web/viewer.html file

- Add i18n to pdfjs matching current site lang

(6ed9230e287ca4915cb52e92391750adbc1ec4d0)

- Hide 'upload file' in the toolbar to avoid confusion of blocktype purpose

(b315e71ff5a39f22573c1c53e68bf8e63f1250c3)

- make paths to pdfjs directories in pdf.viewer.js absolute (I2a5eb907c8aa38799e2a40ae875efbace47cee59)

 No newline at end of file