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 0.15.8 to 0.26.10
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Changelog](https://github.com/TypeStrong/typedoc/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/typedoc@v0.15.8...v0.26.10)

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

Signed-off-by: dependabot[bot] <[email protected]>