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 0.7.2 to 0.23.19
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Changelog](https://github.com/TypeStrong/typedoc/blob/master/CHANGELOG.md)
- [Commits](TypeStrong/typedoc@v0.7.2...v0.23.19)

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

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

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
     "devDependencies": {
         "@types/mocha": "5.2.7",
         "mocha": "6.2.0",
-        "typedoc": "0.7.2",
+        "typedoc": "0.23.19",
         "@types/node": "12.7.3",
         "benchmark": "2.1.4",
         "typescript": "3.1.6",