Bump typedoc from 0.20.16 to 0.20.18 (#511)

Bumps [typedoc](https://github.com/TypeStrong/TypeDoc) from 0.20.16 to 0.20.18.
- [Release notes](https://github.com/TypeStrong/TypeDoc/releases)
- [Commits](TypeStrong/typedoc@v0.20.16...v0.20.18)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>