I feel like this comment could be best structured in the form of a series of commits sent as a combined Merge Request.

First, a commit to change the docs to say it's a pure C99 (or C11 or C17) implementation.

Second, for each of your points, a single commit fixing each style issue (_dispose -> _destroy, typedefs).

Seperately, another MR with the commit for _select improvements.

Or maybe just send the C99 one first, and if that gets rejected, don't bother with the rest.