Raise minimum libsqlite3-sys to 0.24.0

[LucaCappelletti94]

Prerequisite for wrapping sqlite3_autovacuum_pages, mentioned by @weiznich in a comment in PR #5098. That function was added in SQLite 3.37.0 (2021-11) and is absent from the bundled amalgamation of every libsqlite3-sys older than 0.24.0 (the first release to ship SQLite 3.38.0). Bumping the floor here lets the follow-up on_autovacuum PR use the ffi:: alias like every other hook wrapper in the crate.

[weiznich]

I fear that's not possible to change as changing the minimal supported libsqlite3-sys version is a public visible change due to the status of libsqlite3-sys being a sys crate and only one version of a sys crate could exist in a single dependency tree. So a hypothetical uses could have pinned libsqlite3-sys to 0.17.2 and that would break to build with this version bump. So this would require a major version bump, which we don't have planned yet.

I think it's fine to just not have sqlite3_autovacuum_pages support then.

[LucaCappelletti94]

Ok, then sqlite3_autovacuum_pages gets parked until some future date when we decide to bump libsqlite3. Maybe we should register this among the "things that may get unlocked upon a major version bump"?

[weiznich]

Yes that would be meaningful. I've already put a few TODO: diesel 3.0 comments in the source code for similar minor things. Might be meaningful to have that for this function as well.

[LucaCappelletti94]

It would be nice if there was a way to specify "future PR" or some such in GitHub, maybe the next best thing could be a tag for the PR?

[weiznich]

I can tag it with the Diesel 3.0 label we have. Hopefully it doesn't get lost