Lwt 5.3.0

[aantron]

Changelog:

• Add let* and and* in Lwt.Syntax and Lwt_result.Syntax (Define let*, and* ocsigen/lwt#775, Rahul Kumar).
• Also add let+ and and+ (Add {let+,and+} applicative syntax ocsigen/lwt#776, Craig Ferguson).
• Add Lwt_result.both (Define let*, and* ocsigen/lwt#775, Rahul Kumar).
• Always use libev if detected (Tell libev to use kqueue by default on macOS ocsigen/lwt#601).

[camelus]

Commit: fc24e40

A pull request by opam-seasoned @aantron.

☀️ All lint checks passed fc24e40

• These packages passed lint tests: lwt.5.3.0

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☀️ Installability check (+1)

• new installable packages (1): lwt.5.3.0

[kit-ty-kate]

Thanks a lot!