Update bindgen; Update MSRV to 1.70

[justsmth]

Context

• Bindgen versions 0.70, 0.71 and 0.72 fix a variety of issues around bindings generation. See change-log: https://github.com/rust-lang/rust-bindgen/blob/main/CHANGELOG.md
• These versions of bindgen require an MSRV of 1.70.0.

Description

This PR bumps the MSRV to 1.70 and updates the bindgen dependency to 0.72.0 (the latest current release).

Details:

• Updated bindgen-related logic to be compatible the 0.72.0 API changes.
• Applied a "cargo clippy --fix", and removed a clippy-allow that's no longer needed.

[alex]

Is there a reason you changed all the dependencies to use a workspace crate? It seems orthagonal to the purpose of this PR

[justsmth]

Yeah, you're right. That's a completely optional part of this change. I can revert it if you prefer.

[alex]

Yes, we like to keep the scope of PRs constrained All that is necessary for evil to succeed is for good people to do nothing.

…

On Tue, Aug 5, 2025, 6:37 PM Justin W Smith ***@***.***> wrote: ***@***.**** commented on this pull request. ------------------------------ In openssl-sys/build/main.rs <#2438 (comment)> : > @@ -330,7 +325,7 @@ fn validate_headers(include_dirs: &[PathBuf]) -> Version { panic!( " Header expansion error: -{:?} +{e:?} Sorry. I'll fix this typo. — Reply to this email directly, view it on GitHub <#2438 (review)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAAGBEN4HTYIZCOS5WULBT3MEWZXAVCNFSM6AAAAACDFN4MP6VHI2DSMVQWIX3LMV43YUDVNRWFEZLROVSXG5CSMV3GSZLXHMZTAOBZHA4TSMJQHE> . You are receiving this because you commented.Message ID: ***@***.***>

[justsmth]

I reverted my changes related to dependency configuration. I could (did) also revert the bindgen "RustTarget" back to v1.47.0 if you'd prefer. (Sorry, I took more liberties than I should've in a single PR.)

-- EDIT: I changed the bindgen Rust target back to 1.47 to be safe.

[justsmth]

Is anything else needed for this PR? (I think the CI failure is unrelated?)

[alex]

thanks for following up here!