upgrade highlight.js to 10.4.1

[amiramw]

Signed-off-by: Amiram Wingarten amiram.wingarten@sap.com

What it does

Upgrade highlight.js to 10.4.1 as it contain security fix. See https://github.com/highlightjs/highlight.js/blob/master/CHANGES.md#version-1041-tentative

How to test

Create md file with code block highlight that has a language in it and make sure the preview pane show syntax highlighs as before.

```js
var x = 8; 
 ```

See also https://community.theia-ide.org/t/preview-highlight-help/1341/2

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[vince-fugnitto]

I confirmed that the updated dependency version is license compatible 👍 :

@amiramw in the future, you can also perform this check based on the "documentation for new or updated dependencies", and reflect it in the pull-request description.

[kittaakos]

Verified 👍