Bump highlight.js and typedoc

Removes [highlight.js](https://github.com/highlightjs/highlight.js). It's no longer used after updating ancestor dependency [typedoc](https://github.com/TypeStrong/TypeDoc). These dependencies need to be updated together.


Removes `highlight.js`

Updates `typedoc` from 0.14.0 to 0.28.5
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Changelog](https://github.com/TypeStrong/typedoc/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/typedoc@v0.14.0...v0.28.5)

---
updated-dependencies:
- dependency-name: highlight.js
  dependency-version: 
  dependency-type: indirect
- dependency-name: typedoc
  dependency-version: 0.28.5
  dependency-type: direct:development
...

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Author: dependabot[bot]