Support TypeScript 5.6

[Gerrit0]

Search Terms

TypeScript 5.6 release

Problem

TypeDoc warns about not supporting TypeScript 5.6

Suggested Solution

Add TS 5.6 to the list of supported versions.

[Gerrit0]

Note: API review indicates there were no breaking changes, so while TypeDoc versions prior to 0.26.7 will warn about the version being unsupported, it in practice will work just fine.