Add support for v29.0

[jaeyson]

[kianmeng]

@jaeyson Out of curiousity, any plans on when can we see support for this?

[jaeyson]

@kianmeng please refer to this: https://github.com/jaeyson/open_api_typesense/pull/35.

The context: I have to finish the other repo since that's the main dependency of ex_typesense. Had few things to finish on the tests, since the open api spec that I'm following had some changes: renaming function definitions, additional schema and changes, etc.

Aside from that, I have other errands to do. But I'll finish all of this, though it may look a bit like it took too long for progress.

[kianmeng]

@jaeyson Noted, and thanks. We're in the midst of upgrading to v28, hence no urgency on this.